Audio Surveillance Equipment Infrared Transmitter

How our infrared audio surveillance equipment works:  The audio infrared transmitter takes sound from speech, converts it into light, and sends it to a receiver. The receiver turns the light back into sound so you can hear or record the conversation.

Technical explanation for optical surveillance transmitters and their performance: We take a highly sensitive microphone and re-engineer it to interface with an optical modulator, which is then integrated with an audio infrared transmitter. This enables the system as a whole to convert sound waves into non-coherent pulses of light, transmit those light waves over space, and be collected by an optical receiver. Upon arrival at the optical receiver destination, the light waves are de-modulated into sound waves, and able to be monitored with earphones, a speaker, or connected to an audio surveillance recorder. Designed for easy sight alignment, the optical receiver is housed in a single lens reflex camera mounted onto a tripod.

Light pulses are converted back into audio signals with high-density electronic circuitry which filters stray light emission for interference-free listening. A discreet audio-amplifier control module clipped onto a tripod leg filters out noise and increases the signals sensitivity and gain while a LED bar graph indicates signal strength. A miniature voice recorder permits simultaneous recording of all intercepted conversations.

Included with the Infrared Audio Surveillance Equipment kit:
- miniature audio infrared transmitter
- infrared optical receiver
- audio amplifier control module recorder
- headphones
- tripod and mounting accessories