aural transmitter

例句：

1. 1. The aural transmitter was used to transmit audio signals over long distances.
   听觉发射器被用来在长距离上传输音频信号。
2. 2.The aural transmitter was the key to unlocking the secret of the ancient language.
   听觉发射器是解锁古代语言秘密的关键。
3. 3. The aural transmitter was used to enhance the quality of sound for the hearing-impaired.
   听觉发射器被用来提高听力受损者的音质。