| 摘要 |
To provide an array microphone device and the like that keeps sound quality as well as achieves a high-speed convergence in sensitivity correction. The array microphone device is an array microphone device 1 having a microphone array 11 composed of a plurality of microphone units 11a to 11d, which is provided with a signal input section 21 for inputting a signal from the microphone units 11a to 11c to be corrected as a signal to be corrected; a reference signal input section 22 for inputting a reference signal; a gain variable section 23 for amplifying or attenuating the signal to be corrected so that the level of the signal to be corrected and the level of the reference signal is substantially equal to each other; and a gain control section 24 for controlling the gain at the time of amplifying or attenuating the signal to be corrected. The gain control section 24 is provided with a high-speed gain update section 210 for changing the gain with a first amount of change per unit time upon time elapsed since the array microphone device 1 is starting-up being below a predetermined period of time; and a low-speed gain update section 211 for changing the gain with a second amount of change per unit time upon the elapsed time being above or equal to the predetermined period of time, the second amount of change being smaller than the first amount of change. |
