| 摘要 |
An ambient noise reduction apparatus employing a transducer arrangement comprising a plurality of microphone elements B, C, D, with means for adding 17 the respective outputs and filtering or otherwise processing the combined signal 18,19. The ambient noise signal provided by this transducer arrangement is used as an input to an active noise reduction system, with particular application to windy conditions. The microphone elements may be omni-directional and disposed in a common housing which may comprise an acoustic resistive covering material such as mesh, foam or porous plastic. The apparatus may be used in audio or communication devices possibly comprising earphones, headphones or loudspeakers. |
