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touchtone - Tastenton

3 replies   
Examples/ definitions with source references
Authoriche23 Nov 08, 13:12
Comment
Nonsense.
#1Authororeg (353563) 23 Nov 08, 17:31
Suggestions

Key Sound

-

Tastenton -töne



Context/ examples
Sony / Ericsson User Manual W910i
"Clicking" Sound when pressing a button on the cell.
Comment
Touchtone indicates the today standard for the dialling procedure.
#2AuthorJay-Dee14 Apr 09, 16:45
Comment


"DTMF, better known as touch-tone, is a system of signal tones used in telecommunications. Applications include voice mail, help desks, telephone banking, etc.
There are twelve DTMF signals, each of which is made up of two tones from the following selection: 697 Hz, 770 Hz, 852 Hz, 941 Hz, 1209 Hz, 1336 Hz, 1477Hz.
The tones are divided into two groups (low and high), and each DTMF signal uses one from each group. This prevents any harmonics from being misinterpreted as part of the signal. " http://www.mediacollege.com/audio/tone/dtmf.html

"Das Tonwahlverfahren (MFV/DTMF)
Beim Telefonieren nach dem Tonwahlverfahren werden die Wähltöne durch die Überlagerung zweier Töne aus verschiedenen Frequenzbereichen erzeugt. Der Wählton soll dabei 100ms dauern, gefolgt von einer ebenfalls 100ms langen Pause. Die Frequenzen sind in der untenstehenden Tabelle zu sehen. Im Fachenglisch heißt diese Tonerzeugung Dual Tone Multiplexed Frequency (DTMF)
Heutzutage wird generell das Tonwahlverfahren (oder genauer Mehrfrequenzwahlverfahren - MFV) benutzt. Im Englischen wird allgemein der Begriff Touchtone (ehemals ein eingetragenes Warenzeichen der AT&T) benutzt." http://www.vanity-rechner.de/dtmf.html
#3AuthorCM2DD (236324) 14 Apr 09, 16:54
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