阅读说明：本技术 基于多工作模式麦克风的室内扩声系统工作模式切换方法 (Indoor sound amplification system working mode switching method based on multi-working mode microphone ) 是由 杨林 于 2020-05-20 设计创作，主要内容包括：本发明涉及多模室内扩声系统的工作模式切换方法,属于室内扩声系统技术领域。该方法执行如下步骤：1)初始参数初始化；2)麦克风的工作模式切换,室内扩声系统的拾音模式发生变化；室内扩声系统中的相应设备调整至对应的初值参数；并持续进行人声检测；3)判断室内扩声系统是否会存在啸叫风险；4)结束工作模式切换,音箱输出增益保持稳定,保存当前模式的所述参照值。本发明提出了一种具有自适应的工作模式调整的方法。随着麦克风工作模式的切换,方法即启动生效,为使用者提供最佳的参数设置。由于单次循环时间不超过30ms,系统在进行参数调节时,使用者察觉不到声音变化。本方法通过反复的调整各项参数以使得测量值趋近于参照值。(The invention relates to a working mode switching method of a multi-mode indoor sound amplifying system, belonging to the technical field of indoor sound amplifying systems. The method comprises the following steps: 1) initializing initial parameters; 2) the working mode of the microphone is switched, and the sound pickup mode of the indoor sound amplification system is changed; adjusting corresponding equipment in the indoor sound reinforcement system to the corresponding initial value parameters; and continuously carrying out human voice detection; 3) judging whether the indoor sound amplification system has a howling risk or not; 4) and finishing the switching of the working mode, keeping the output gain of the sound box stable, and storing the reference value of the current mode. The invention provides a method for adjusting a self-adaptive working mode. With the switching of the microphone working mode, the method is started to be effective, and the optimal parameter setting is provided for the user. Since the single cycle time does not exceed 30ms, the user is unaware of the sound changes while the system is performing parameter adjustments. The method repeatedly adjusts various parameters to make the measured value approach the reference value.)

1. The method for switching the working modes of the indoor sound amplification system based on the multi-working-mode microphone is characterized by comprising the following steps of:

1) initializing initial parameters;

the initial parameters comprise reference values and initial value parameters of each mode;

the initial value parameters comprise microphone sensitivity and loudspeaker box output gain;

2) the working mode of the microphone is switched, and the sound pickup mode of the indoor sound amplification system is changed; adjusting corresponding equipment in the indoor sound reinforcement system to the corresponding initial value parameters; and continuously carrying out human voice detection;

3) judging whether the indoor sound amplification system has a howling risk or not;

if the howling risk exists, reducing the output gain of the sound box, and returning to the step 3)

If no howling risk exists, adjusting the output gain of the sound box to enable the measured value to approach or be equal to the reference value;

a comparing whether the measured value is greater than a reference value;

if the measured value is smaller than the reference value, increasing the output gain of the sound box, returning to the step 3), and judging whether the whistle is generated again; after circulating for a plurality of times, if the measured value is still smaller than the reference value, jumping out of the circulation and turning to the step c;

if the measured value is greater than the reference value, performing step b;

b, reducing the output gain of the sound box;

c judging whether the measured value is less than or equal to the reference value;

if the measured value is smaller than the reference value and the measured value is in a threshold range exceeding the reference value, assigning the current value of the measured value to the reference value;

if the measured value is equal to the reference value, the reference value remains unchanged;

if the measured value is larger than the reference value, reducing, returning to the beginning of the step c, and judging again;

after a plurality of cycles, turning to step 4);

4) ending the switching of the working mode, keeping the output gain of the sound box stable, and storing the reference value of the current mode;

each cycle time in the step 3) is less than 30 ms.

2. The method for switching the operation mode of the indoor sound reinforcement system based on the multi-operation mode microphone according to claim 1, wherein: detecting acoustic feedback confirms whether there is a howling risk.

3. The method for switching the operation mode of the indoor sound reinforcement system based on the multi-operation mode microphone according to claim 1, wherein: the reference value is determined according to the requirement of the indoor space on the sound amplifying system and the specific installation position of the collector.

4. The method for switching the operation mode of the indoor sound reinforcement system based on the multi-operation mode microphone according to claim 1, wherein: the multi-working mode microphone comprises a handheld mode, a table microphone mode and a hanging microphone mode.

Technical Field

The invention relates to a working mode switching method of a multi-mode indoor sound amplifying system, belonging to the technical field of indoor sound amplifying systems.

Background

The indoor sound amplifying system is divided into an indoor sound amplifying system and a sound reproducing system according to the working type; the system is classified into an outdoor and indoor sound reinforcement system, an indoor sound reinforcement system, a mobile performance system, a public address system (PA), and a conference system according to the purpose. Different types and applications of operation make the indoor sound reinforcement system need to be designed in a targeted manner.

If the scene needs to work with microphones (boom microphone, table microphone, hand microphone) of various modes. The conventional solution is to provide three different sets of system implementations to prevent the different modes from interfering with each other; or three different microphone input systems are used for inputting, and the sound console is connected to realize one-way output.

For the convenience of analyzing the problem, a teaching scene is taken as an example. Chronic pharyngitis is known as a common occupational disease of teachers. According to incomplete statistics of the education department, the seven-ingredient teachers are in a sub-health state or a diseased state. For the sake of human care, it is common to equip a sound amplification system in a classroom. However, the conventional table microphone sound reinforcement often limits the activity space and the class performance of teachers due to different habits of each person. Most classrooms are equipped with at least two different types of microphones for use where conditions permit.

This also coincides with the application scenario of our previously mentioned second approach. However, in practice, the second solution also has drawbacks during use. For example, when a user switches between different systems, the mixing console needs to set different parameters. However, users often do not have the ability to use the mixing console or only have the ability to use a portion of it. Therefore, a professional is required to set the parameters in advance during use, or the sound console has default parameter configuration after the working mode is switched. The use of default configurations is clearly not targeted and the functionality that the sound mixing console device can implement is compromised. It is obvious that the sound mixing console application in this scheme is a waste of resources.

Therefore, a set of scheme is needed, which can not only provide targeted parameter setting, but also avoid the trouble of operating a complex sound console by a user.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to solve the deficiencies of the prior art and provide a method for seamlessly switching operating modes of an indoor sound reinforcement system based on a microphone with multiple operating modes.

The purpose of the technical scheme is realized by the following technical scheme: the working mode switching method of the multimode indoor sound reinforcement system comprises the following steps:

1) initializing initial parameters;

the initial parameters comprise reference values and initial value parameters of each mode;

the initial value parameters comprise microphone sensitivity and loudspeaker box output gain;

2) the working mode of the microphone is switched, and the sound pickup mode of the indoor sound amplification system is changed; adjusting corresponding equipment in the indoor sound reinforcement system to the corresponding initial value parameters; and continuously carrying out human voice detection;

3) judging whether the indoor sound amplification system has a howling risk or not;

if the howling risk exists, reducing the output gain of the sound box, and returning to the step 3)

If no howling risk exists, adjusting the output gain of the sound box to enable the measured value to approach or be equal to the reference value;

a comparing whether the measured value is greater than a reference value;

if the measured value is smaller than the reference value, increasing the output gain of the sound box, returning to the step 3), and judging whether the whistle is generated again; after circulating for a plurality of times, if the measured value is still smaller than the reference value, jumping out of the circulation and turning to the step c;

if the measured value is greater than the reference value, performing step b;

b, reducing the output gain of the sound box;

c judging whether the measured value is less than or equal to the reference value;

if the measured value is smaller than the reference value and the measured value is in a threshold range exceeding the reference value, assigning the current value of the measured value to the reference value;

if the measured value is equal to the reference value, the reference value remains unchanged;

if the measured value is larger than the reference value, reducing, returning to the beginning of the step c, and judging again;

after a plurality of cycles, turning to step 4);

4) ending the switching of the working mode, keeping the output gain of the sound box stable, and storing the reference value of the current mode;

each cycle time in the step 3) is less than 30 ms.

The improvement of the technical scheme is as follows: detecting acoustic feedback confirms whether there is a howling risk.

The improvement of the technical scheme is as follows: the reference value is determined according to the requirement of the indoor space on the sound amplifying system and the specific installation position of the collector.

The improvement of the technical scheme is as follows: the multi-working mode microphone comprises a handheld mode, a table microphone mode and a hanging microphone mode.

The technical scheme of the invention has the following beneficial effects: the invention provides a method for adjusting a self-adaptive working mode. With the switching of the microphone working mode, the method is started to be effective, and the optimal parameter setting is provided for the user. Since the single cycle time does not exceed 30ms, the user is unaware of the sound changes while the system is performing parameter adjustments. After a plurality of continuous cycles, the system parameters tend to be stable along with the use of the user, and parameter adjustment is completed under the condition that the user feels no.

The method continuously detects the voice in the adjusting process (the voice is characteristic, and whether the voice exists in the collected signals can be determined according to the characteristics of the voice). So as to prevent the data generated when the speaking is not performed or interrupted during the mode switching process from being used as the parameter adjustment basis. And finally, each numerical value after being adjusted and stabilized cannot meet the requirement of normal sound amplification.

The method repeatedly adjusts various parameters to make the measured value approach the reference value. The process conforms to design rules. The reference value in the method can be regarded as a representation value of the sound field which is used as an important consideration standard in the sound amplification system design.

According to the method, a set of microphone sensitivity and audio box output gain is prestored in each working mode, so that the time and the change interval of mode switching parameter adjustment are reduced, and the mode switching process can be quicker and more stable.

Drawings

FIG. 1 is a schematic flow chart of a method in an embodiment of the present invention.

Detailed Description