UK "unobtainable"/"wrong number" tone, heard on UK land lines. I reproduced it from the ETSI ETS300-001 specification.
A synthesized sinusoid of 440 Hz, corresponding to the frequency of the note A4, with a duration of 10 seconds ...
Made by a student in Lyon, France.
Sounds just like a telephone, in pack BEEP this is a GoLDBeRG.
Telephone unobtainable or disconnect tone recorded in the UK
Set computer volume level at normal. Using headphones or your speakers, play each tone, gradually decreasing the volume until you ...
Synthesised dial tone sample 350 Hz and 440 Hz I believe ok for a UK dial tone
A one second sinewave of 440Hz, the frequency that corresponds to an A4.
A one second sinewave of frequency 490Hz
Sine wave. 440 Hz frequency Created with Audacity