[Jason] has continued to plug along with his sonar build and recently showed up a monostatic active sonar using a piezo element and microphone. Regular readers will remember [Jason’s ...

Description: Transducers USA produces quality audible signal devices at very competitive prices for Original Equipment Manufacturers. Our company manufactures a comprehensive line of audio indicators ...

The result is a speaker that is extremely quiet unless it is pressed against your face. Building the bone conduction mic was pretty simple. [Ben] started with a typical disk-shaped piezoelectric ...