Telephone answering device with low cost dual tone multi-frequen
Telephone tone analysis system
Telephone tone detector
Tone detection
Tone detection
Tone detection process and device for implementing said process
Tone detector
Tone detector judging a detection of a predetermined tone...
Tone detector with improved performance in the presence of speec
Tone receiver comprising a switch capacitor zero crossing detect
Tone, modulated tone, and saturated tone detection in a...
Tone-detection method for detecting at least one tone in a dual-
Tone-type recognition method
Transmission system with improved tone detection
Transmission system with improved tone detection