This post is also available in: Tiếng Việt (Vietnamese)

Laser audio monitoring system consists of laser transmitter and laser receiver with relatively small size, easy to use. Any sound inside the room will create some vibration on the glass window.

How the System works:

Parallel infrared laser beam will be projected on the glass of window. The reflected laser beam is adjusted from the vibration of the door glass plate and then received by the laser receiver.

Then the signal will be selected by specialized software. The beams are amplified, demodulated and converted into audio signals. Users can use the headset or line out to listen to the sound captured from the device.