When the circuit detects a sound activity it generates a digital/logic-level (active-low state) output for a pre- settled duration fixed by the ... Prototype tested with both front-end circuits, but a ...

RF Spy Bug Detector Circuit. May 23, 2013 by P. Marian Comments 8. Advertisement. ... The sound is amplified by A4 section and then is applied to a 8Ω/0.5W speaker. Use a telescopic antenna that can ...

Scientists have demonstrated a new kind of detector for sound at the level of quietness of quantum mechanics. The result offers prospects of a new class of quantum hybrid circuits that mix ...

All the latest science news on sound detector from Phys.org. Find the latest news, advancements, and ... The result offers prospects of a new class of quantum hybrid circuits that mix ...