Communications crystal microphone with high output (-45 db) and speech-tailored frequency response 30 to 7500 cps. Technical Specifications Manufacturer Astatic Model D-104 Device Function Communications Crystal Microphone Output Level High output (-45 dB) Frequency Response Speech-tailored response 30 to 7500 … Continue reading →

Description Noise cancelling microphone.

Description Noise cancelling microphone.

Description Semi-directional frequency response contoured microphone capable of Electronic, Relay, or special wiring hookups.