A standard electret microphone and a single-transistor amplifier provide an audio signal that can be processed by an Arduino’s analog input.Here's how it's done.

Although many older telephone sets are electrically and mechanically perfectly sound units, their speech quality is poor compared with that of modern, all-electronic, sets (except the cheap types used ...

If you’ve ever used a cellphone, hearing aid, or baby monitor, listened to live or recorded music, or recorded anything yourself, you’re indebted to James West. West is the co-inventor of the electret ...

Any modern phone call placed, voice recording captured, karaoke song belted or conversation amplified via hearing aid would not be possible without James West. West, now a professor of electrical and ...