A new microphone Sound Detection System (SDS) is now available from Biosystems as an option on new PosiChek3 computerized performance testers for air-supplied breathing apparatus. Designed to ...

Simple Sound Processor presented here is an ultra-simple circuit module ... can replace the microphone electronics with a single-transistor circuit as shown below: Prototype tested with both front-end ...

Here’s how the noise detection works: by activating your microphone, this optional feature lets the game’s deadly creatures detect every sound you make in real life, bringing the horror ...