Phone Tones: The hidden language of phone number beeps
Twenty Thousand Hertz
00:00
Touchtones - The Future of Answering Machines
With a Touchtone, your dialing number as fast as you're thinking it. The explosion of voicemail machines also led to a bizarre trend using kitschy pre-recorded songs for voice messages. In the early 80s, a company called Formidable Inks sold a tape of Teletunes with 13 different messages that people could put on their answering machines.
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