MICROPHONE EQUIPMENT AND VIDEO INTEGRATION CAMERA MOUNTED WITH THE MICROPHONE EQUIPMENT

摘要

PURPOSE:To reduce noise near a microphone unit, vibration and wind noise and to attain sound collection with excellent S/N by using a nondirective microphone and unidirectional microphone. CONSTITUTION:An output signal of a unidirectional microphone unit 13 is given to a high pass filter 15 to correct the sudden increase in the sensitivity at a low frequency band due to proximity effect. Moreover, a high pass filter 14 is used to match the frequency characteristic of the output signal of the nondirective microphone unit 12 at a low frequency band with the frequency characteristic of the signal passing through the high pass filter 15. Then outputs of the high pass filters 14, 15 are subtracted together to obtain an output of the microphone unit. Thus, noise near the microphone unit and wind noise are reduced and the sound collection with excellent S/N is attained.