ToneDet is used to monitor an audio signal for a specific frequency tone or multiple tones. Althrough it can detect any audio frequency, ToneDet is usually used to detect very low frequency tones that cannot be heard by humans.

Typical Applications include Radio Network Broadcasts (to automatically trigger commercial breaks), Control Systems (To control remove systems over an audio system), Remote Audio Switches (To switch signals on and off using tones), Sub-band information transmission (To transmit information over an audio transmission) and many more related applications.