The Model 3324C Diver Helium Speech unscramble is well established with large commercial diving companies, the military, deep sea research organisations and for medical hyperbaric chambers, where clarity of unscrambled speech is paramount.

The unscramblers use an audio amplifier with cross switching to allow communication between the tender and the divers. Two complex forms of digital techniques using time domanin processing are used to filter and lower the frequency of a divers voice resulting intelligible speech. Mode one available on both 3319A and 3342C units is designed for use at normal depths with a normal microphone. Mode two available only on the higher specification 3342C is intended for diving to 610m (2000ft) using a high quality microphone.

A remote switch can also be connected allowing a foot pedal to perform the press to talk function. The record jack allows a recording device to make complete records of all communications.

Specification:

8 Hours or more between charges Battery Life. 300Hz to 12 KHz Frequency Response. 6W Power Output. Record Connection. Crosstalk. Press to Talk. Unscrambler Depth. External Speaker Connection.