阅读说明：本技术 音频放大器 (Audio amplifier ) 是由 托马斯·克里斯托弗森·布尔斯塔德 于 2018-12-19 设计创作，主要内容包括：一种电子设备,包括扬声器保护模块(36),该扬声器保护模块被布置为接收音频信号(22)并使用与扬声器有关的一个或多个参数来产生受控的音频信号(34)。放大器(40)被布置为对受控的音频信号进行放大以产生经放大的音频信号(24、26),该经放大的音频信号被传送到扬声器。受控的音频信号(34)的幅度使得经放大的音频信号(24、26)小于或等于根据上述一个或多个参数确定的对于扬声器而言安全的幅度。超声发生器(16)被布置为生成超声信号(30),该超声信号在受控的音频信号(34)被传送到放大器(40)之前与该受控的音频信号(34)进行混合(32)。超声发生器(16)能够以多个频率产生所述超声信号。(An electronic device comprises a speaker protection module (36) arranged to receive an audio signal (22) and to generate a controlled audio signal (34) using one or more parameters relating to a speaker. An amplifier (40) is arranged to amplify the controlled audio signal to produce an amplified audio signal (24, 26) which is transmitted to the loudspeaker. The amplitude of the audio signal (34) is controlled such that the amplified audio signal (24, 26) is less than or equal to an amplitude determined to be safe for the loudspeaker in accordance with the one or more parameters. The ultrasound generator (16) is arranged to generate an ultrasound signal (30) which is mixed (32) with the controlled audio signal (34) before the controlled audio signal (34) is transmitted to the amplifier (40). An ultrasound generator (16) is capable of generating the ultrasound signal at a plurality of frequencies.)