阅读说明：本技术 一种助听器适应性训练纠正方法及装置 (Hearing aid adaptability training correction method and device ) 是由 朱江涛 向文林 许立 陈可夫 向文明 于 2021-09-19 设计创作，主要内容包括：本发明专利提供了一种助听器适应性训练纠正方法及装置,应用于助听器的智能控制终端,包括：获取分级训练词库,所述分级训练词库中的单项词汇含有相应的单项词汇内容选项及正确选项信息；随机选择所述分级训练词库中的单项词汇传输给助听器播放,并根据所述助听器播放内容显示单项词汇内容选项,接收输入的所述单项词汇内容选项辨别选项信息,本公开通过将每次听力训练的单项词汇内容选项进行分类,能够在听损患者出现辨别选项信息错误时,提高同类内容选项的单项词汇的随机概率,使得听损患者能够增加对佩戴助听器后的不适应听力损失加强训练,极大地提高了听力训练的效率和质量,通过对同类内容选项的单项词汇的随机概率的监测。(The invention provides a method and a device for correcting hearing aid adaptability training, which are applied to an intelligent control terminal of a hearing aid and comprise the following steps: acquiring a hierarchical training word bank, wherein the single words in the hierarchical training word bank contain corresponding single word content options and correct option information; the method includes the steps that single words in the hierarchical training word library are randomly selected and transmitted to a hearing aid to be played, single word content options are displayed according to playing contents of the hearing aid, and input single word content option distinguishing option information is received.)

1. A hearing aid adaptive training correction method is characterized by being applied to a smart control terminal of a hearing aid and comprising the following steps:

acquiring a hierarchical training word bank, wherein the single words in the hierarchical training word bank contain corresponding single word content options and correct option information;

randomly selecting the single vocabulary in the hierarchical training lexicon, transmitting the single vocabulary to a hearing aid for playing, displaying single vocabulary content options according to the playing content of the hearing aid, and receiving input single vocabulary content option identification option information;

verifying whether the discrimination option information of the single vocabulary content option is consistent with correct option information;

if not, increasing the random probability of the single vocabulary of the content options of the single vocabulary and the content options of the training category information.

2. The method of claim 1 wherein the step of increasing the probability of randomness for the individual words of the content items of the training category information with respect to the individual word content items comprises:

grouping the single vocabulary content options in the hierarchical training word stock according to different frequency, tone or loudness detection standards, wherein the detection standard groups comprise a plurality of sub-groups, and the initial probability of the single vocabulary of each group of content options is the same;

determining training category information associated with the single vocabulary content option;

and improving the random probability ratio of the grouping corresponding to the single vocabulary content options.

3. The method of claim 1, wherein increasing the random probability fraction of the groupings corresponding to the single lexical content items comprises:

determining the detection standard group corresponding to the single vocabulary content option;

determining a sub-packet of the detection criteria packet;

and changing an algorithm mode for randomly selecting the single vocabulary corresponding to the sub-grouping of the detection standard grouping in the hierarchical training lexicon.

4. The method of claim 1, further comprising:

and if the random probability of the single vocabulary of the content options of the same training class information reaches a preset value, prompting that the training class information is hearing loss, and clearing the random probability of the single vocabulary of the training class information.

5. A hearing aid adaptability training correction device is characterized in that, the device is applied to a smart control terminal of a hearing aid, and comprises:

the acquisition module is used for acquiring a hierarchical training word bank, and the single words in the hierarchical training word bank contain corresponding single word content options and correct option information;

the receiving and sending module is used for randomly selecting the single vocabulary in the hierarchical training lexicon and transmitting the single vocabulary to the hearing aid for playing, displaying single vocabulary content options according to the playing content of the hearing aid and receiving input single vocabulary content option distinguishing option information;

the judging module is used for verifying whether the discrimination option information of the single vocabulary content option is consistent with the correct option information;

and the feedback module is used for increasing the random probability of the single vocabulary of the content options of the training category information and the single vocabulary content options.

6. The apparatus of claim 5, wherein the feedback module comprises:

the classification module is used for grouping the single vocabulary content options in the hierarchical training word stock according to different frequency, tone or loudness detection standards, the detection standard groups comprise a plurality of sub-groups, and the initial probabilities of the single vocabularies of each group of the content options are the same;

the association module is used for determining the training category information associated with the single vocabulary content options;

and the adjusting module is used for improving the random probability ratio of the grouping corresponding to the single vocabulary content options.

7. The apparatus of claim 5, wherein the adjustment module comprises:

a first determining module, configured to determine a detection standard group corresponding to the single vocabulary content option;

a second determining module for determining sub-packets of the detection criteria packet;

and the adjusting submodule is used for changing an algorithm mode of randomly selecting the single vocabulary corresponding to the sub-grouping of the detection standard grouping in the hierarchical training word stock.

8. The apparatus of claim 5, further comprising:

and the elimination module is used for prompting that the training class information is hearing loss if the random probability of the single vocabulary of the content options of the same training class information reaches a preset value, and clearing the random probability of the single vocabulary of the training class information.

9. A hearing aid adaptation training correction device, comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to perform the steps of the method of any one of claims 1 to 4.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.

Technical Field

The invention relates to the field of hearing aids, in particular to a hearing aid adaptability training correction method and a hearing aid adaptability training correction device.

Background

For a patient who wears the hearing aid for the first time, it is important how to correctly bridge the adaptation period of wearing the hearing aid, when the patient is accustomed to wearing the hearing aid, the hearing aid can be worn in a noisy environment, and the hearing aid can be worn for a long time, during which many noises in life can be heard, which are not heard for a long time due to the hearing loss of your, and through which you hear these forgotten sounds or noises, but these are sounds actually existing in life, which are sounds to be heard, which are unavoidable sounds to be heard like how you can hear laughter, speech sounds, and bird calls, which are beautiful sounds to be heard, and during wearing, you need to exercise to concentrate on listening to those happy sounds and ignore those annoying sounds.

In the process of hearing aid training, hearing loss patients often have difficulty in distinguishing permanent hearing loss and uncomfortable hearing loss after wearing hearing aids, for the latter, hearing loss can be compensated and promoted through reasonable training, but for the former, more hearing training can not be repaired, and a large amount of time is wasted by the hearing loss patients, so that how to rapidly improve training efficiency and avoid the influence of the permanent hearing loss on the hearing training becomes more important, and a hearing aid adaptation training correction method and device are needed urgently.

SUMMARY OF THE PATENT FOR INVENTION

Aiming at the defects in the prior art, the invention provides a hearing aid adaptive training correction method and a device, which are used for rapidly improving the training efficiency and avoiding the influence of permanent hearing loss on hearing training.

According to a first aspect of the embodiments of the present disclosure, a preferred embodiment of the present invention provides a hearing aid adaptive training correction method applied to a smart control terminal of a hearing aid, including:

acquiring a hierarchical training word bank, wherein the single words in the hierarchical training word bank contain corresponding single word content options and correct option information;

randomly selecting the single vocabulary in the hierarchical training lexicon, transmitting the single vocabulary to a hearing aid for playing, displaying single vocabulary content options according to the playing content of the hearing aid, and receiving input single vocabulary content option identification option information;

verifying whether the discrimination option information of the single vocabulary content option is consistent with correct option information;

if not, increasing the random probability of the single vocabulary of the content options of the single vocabulary and the content options of the training category information.

In one embodiment, if the random probability of the single vocabulary with the content options of the training category information is not increased, the method includes:

grouping the single vocabulary content options in the hierarchical training word stock according to different frequency, tone or loudness detection standards, wherein the detection standard groups comprise a plurality of sub-groups, and the initial probability of the single vocabulary of each group of content options is the same;

determining training category information associated with the single vocabulary content option;

and improving the random probability ratio of the grouping corresponding to the single vocabulary content options.

In an embodiment, the increasing the random probability ratio of the grouping corresponding to the single vocabulary content option includes:

determining the detection standard group corresponding to the single vocabulary content option;

determining a sub-packet of the detection criteria packet;

and changing an algorithm mode for randomly selecting the single vocabulary corresponding to the sub-grouping of the detection standard grouping in the hierarchical training lexicon.

In an embodiment, the method further comprises:

and if the random probability of the single vocabulary of the content options of the same training class information reaches a preset value, prompting that the training class information is hearing loss, and clearing the random probability of the single vocabulary of the training class information.

According to a second aspect of the embodiments of the present disclosure, there is provided a hearing aid adaptability training correction device applied to a smart control terminal of a hearing aid, including:

the acquisition module is used for acquiring a hierarchical training word bank, and the single words in the hierarchical training word bank contain corresponding single word content options and correct option information;

the receiving and sending module is used for randomly selecting the single vocabulary in the hierarchical training lexicon and transmitting the single vocabulary to the hearing aid for playing, displaying single vocabulary content options according to the playing content of the hearing aid and receiving input single vocabulary content option distinguishing option information;

the judging module is used for verifying whether the discrimination option information of the single vocabulary content option is consistent with the correct option information;

and the feedback module is used for increasing the random probability of the single vocabulary of the content options of the training category information and the single vocabulary content options.

In one embodiment, the feedback module includes:

the classification module is used for grouping the single vocabulary content options in the hierarchical training word stock according to different frequency, tone or loudness detection standards, the detection standard groups comprise a plurality of sub-groups, and the initial probabilities of the single vocabularies of each group of the content options are the same;

the association module is used for determining the training category information associated with the single vocabulary content options;

and the adjusting module is used for improving the random probability ratio of the grouping corresponding to the single vocabulary content options.

In one embodiment, the adjustment module includes:

a first determining module, configured to determine a detection standard group corresponding to the single vocabulary content option;

a second determining module for determining sub-packets of the detection criteria packet;

and the adjusting submodule is used for changing an algorithm mode of randomly selecting the single vocabulary corresponding to the sub-grouping of the detection standard grouping in the hierarchical training word stock.

In one embodiment, the apparatus further comprises:

and the elimination module is used for prompting that the training class information is hearing loss if the random probability of the single vocabulary of the content options of the same training class information reaches a preset value, and clearing the random probability of the single vocabulary of the training class information.

According to a third aspect of the disclosed embodiments, the present invention provides a hearing aid adaptation training correction device, comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to perform the steps of the above method.

According to a fourth aspect of the embodiments of the present disclosure, the present patent provides a computer-readable storage medium having stored thereon a computer program, the computer program being executed by a processor for performing the steps of the above-mentioned method.

According to the technical scheme, the hearing aid adaptability training correction method and the device provided by the invention have the following beneficial effects: the single vocabulary content options of each hearing loss training are classified, the random probability of the single vocabulary of the same type of content options can be improved when the hearing loss patient has wrong option information identification, so that the hearing loss patient can increase the strengthening training of the unadapted hearing loss after wearing the hearing aid, the efficiency and the quality of the hearing loss training are greatly improved, the training class information of the single vocabulary of the hearing loss patient which cannot be screened can be determined by monitoring the random probability of the single vocabulary of the same type of content options, the frequency, the tone or the loudness information of corresponding hearing loss content are obtained, the hearing loss patient is helped to make up the fitting hole, and the hearing aid system of the hearing loss patient can be gradually improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the patentable embodiments of the invention, reference will now be made to the appended drawings, which are briefly described as embodiments or as required in the prior art description. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

Fig. 1 is a flow chart of a hearing aid adaptive training correction method provided by the present invention;

fig. 2 is a flowchart of step S14 in a hearing aid adaptability training correction method according to the present invention;

fig. 3 is a flowchart of step S23 in the hearing aid adaptability training correction device according to the present invention;

fig. 4 is a block diagram of a hearing aid adaptability training correction device provided by the present patent;

fig. 5 is a block diagram of a feedback module in the hearing aid adaptability training correction apparatus according to the present invention;

fig. 6 is a block diagram of another hearing aid adaptation training correction apparatus provided by the present patent.

Detailed Description

Embodiments of the patented technology of the present invention will be described in detail below with reference to the drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only used as examples, and the protection scope of the present invention is not limited thereby.

Fig. 1 is a flowchart of a hearing aid adaptive training correction method according to the present invention, which is applied to an intelligent control terminal of a hearing aid, where the terminal can display information such as pictures, videos, short messages, and wechat. The terminal may be equipped with any terminal device having a display screen, such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like. In the hearing aid adaptive training correction method provided by the present embodiment, as shown in fig. 1, the method, applied to an intelligent control terminal of a hearing aid, includes the following steps S11-S14:

in step S11, a hierarchical training lexicon is obtained, wherein the individual words in the hierarchical training lexicon contain corresponding individual word content options and correct option information;

optionally, the single vocabulary content option includes a caption prompt and a related option proposed for the single vocabulary, and the related option information includes at least one correct option information;

in step S12, randomly selecting a single vocabulary in the hierarchical training lexicon, transmitting the single vocabulary to a hearing aid for playing, displaying a single vocabulary content option according to the content played by the hearing aid, and receiving input single vocabulary content option identification option information;

optionally, the intelligent control terminal selects any single vocabulary as a training vocabulary through random program control, the training vocabulary information is transmitted to the hearing aid in a wireless communication mode, an electric signal is converted into an acoustic signal by the hearing aid for playing, and furthermore, caption prompts and related options are displayed on the intelligent control terminal for hearing-impaired people to select and record the selected options;

in step S13, verifying whether the discrimination option information of the one-item vocabulary content option coincides with correct option information;

in step S14, if the random probability of the single vocabulary with the content options of the training category information and the content options of the single vocabulary are not increased;

according to the implementation mode, when the option selected by the hearing-impaired person is inconsistent with the correct option information, the random probability of the single vocabulary of the similar content options is improved, so that the hearing-impaired patient can increase the training for strengthening the improper hearing loss after wearing the hearing aid, and the efficiency and the quality of the hearing training are greatly improved.

In one embodiment, as shown in fig. 2, if the random probability of the single vocabulary of the content item of the training category information is not increased in step S14, the method includes the following steps S21-S23:

in step S21, grouping the individual vocabulary content options in the hierarchical training lexicon according to different detection criteria of frequency, timbre or loudness, where the detection criteria comprise a plurality of sub-groups, and the initial probabilities of the individual vocabularies of each group of content options are the same;

in step S22, determining training category information associated with the single vocabulary content item;

in step S23, the random probability ratio of the groups corresponding to the single vocabulary content options is increased;

optionally, the content options of the single vocabulary are divided into training category information determined by one of different frequency, timbre or loudness detection criteria groups.

In one embodiment, as shown in fig. 3, in step S23, the method for increasing the random probability ratio of the grouping corresponding to the single item of vocabulary content option includes the following steps S31-S33:

in step S31, determining the detection criteria groups corresponding to the single item of vocabulary content options;

in step S32, a sub-packet of the detection criterion packet is determined;

for example, the following steps are carried out: when the size of the whistling sound is judged to be wrong, the probability of a hearing-impaired person for loudness training grouping is firstly determined and improved, and then the decibel range with the loudness selection mistake is determined so as to improve the selection probability of the single vocabulary corresponding to the content options within the decibel range.

In step S33, the algorithm mode for randomly selecting the single vocabulary corresponding to the sub-grouping of the detection standard grouping in the hierarchical training lexicon is changed.

In the implementation mode, the probability of selecting the single vocabulary corresponding to the corresponding content option is improved through a probability algorithm so as to gradually strengthen the training intensity of the hearing-impaired patient on the training category corresponding to the content option;

in an embodiment, as shown in fig. 1, the method further includes the following step S15:

in step S15, if the random probability of the individual vocabulary of the content item of the same training category information reaches a preset value, prompting that the training category information is hearing loss, and clearing the random probability of the individual vocabulary of the training category information;

for example, the following steps are carried out: when a hearing-impaired person trains the single words of the content options grouped in the range of 15KHZ to 18KHZ, the accuracy is lower than a preset value, that is, the random probability of the single words corresponding to the content options is increased to the preset value, which means that the hearing-impaired person has serious hearing deficiency and can not recover the sound in the range of 15KHZ to 18KHZ, and a targeted therapy is required.

The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.

Fig. 4 is a block diagram of a hearing aid adaptability training correction device according to the present invention, which may be implemented as part or all of an electronic device through software, hardware or a combination of both. As shown in fig. 3, the apparatus, applied to a smart control terminal of a hearing aid, includes:

an obtaining module 121, configured to obtain a hierarchical training lexicon, where a single vocabulary in the hierarchical training lexicon includes a corresponding single vocabulary content option and correct option information;

the transceiver module 122 is configured to randomly select a single vocabulary in the hierarchical training lexicon, transmit the single vocabulary to the hearing aid for playing, display a single vocabulary content option according to the content played by the hearing aid, and receive input identification option information of the single vocabulary content option;

a determining module 123, configured to verify whether the discrimination option information of the single vocabulary content option is consistent with the correct option information;

and the feedback module 124 is used for increasing the random probability of the single vocabulary of the content options of the training category information and the single vocabulary content options.

The single vocabulary content options of each hearing loss training are classified, the random probability of the single vocabulary of the same type of content options can be improved when the hearing loss patient has wrong option information identification, so that the hearing loss patient can increase the strengthening training of the unadapted hearing loss after wearing the hearing aid, the efficiency and the quality of the hearing loss training are greatly improved, the training class information of the single vocabulary of the hearing loss patient which cannot be screened can be determined by monitoring the random probability of the single vocabulary of the same type of content options, the frequency, the tone or the loudness information of corresponding hearing loss content are obtained, the hearing loss patient is helped to make up the fitting hole, and the hearing aid system of the hearing loss patient can be gradually improved.

In one embodiment, as shown in fig. 5, the feedback module 124 includes:

the classification module 131 is configured to group the content options of the single words in the hierarchical training lexicon according to different detection criteria of frequency, timbre, or loudness, where the detection criteria group includes a plurality of sub-groups, and the initial probabilities of the single words of each group of the content options are the same;

an association module 132, configured to determine training category information associated with the single vocabulary content option;

the adjusting module 133 is configured to increase a random probability ratio of the groups corresponding to the single vocabulary content options.

In one embodiment, as shown in fig. 5, the adjusting module 133 includes:

a first determining module 141, configured to determine the detection criteria groups corresponding to the single vocabulary content options;

a second determining module 142, configured to determine a sub-packet of the detection criteria packet;

and the adjusting submodule 143 is configured to change an algorithm mode of randomly selecting a single vocabulary corresponding to the sub-packet of the detection standard packet in the hierarchical training lexicon.

In one embodiment, as shown in fig. 4, the apparatus further includes:

and the eliminating module 125 is configured to prompt the training category information to be hearing loss if the random probability of the single vocabulary of the content option of the same training category information reaches a preset value, and clear the random probability of the single vocabulary of the training category information.

The embodiment of the present disclosure further provides a hearing aid adaptability training correction device:

fig. 6 is a block diagram illustrating a hearing aid adaptation training correction apparatus 800 according to an exemplary embodiment. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 6, the apparatus 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed status of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof.

In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the device 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.