microphonen.麦克风；扩音器microphone carrier system传声器载波系统microphone auto-measure麦克风自动巡检microphone protection grid传声器保护罩microphone output terminal传声器输出端子microphone pressure response传声器声压响应microphone-input connection话筒输入连线microphone measuring standard传声器测量标准microphone and stand therefor传声器及其支架microphone correction apparatus传声器校正仪器microphone calibration apparatus传声器校准器