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The sound was made into a mobile phone ringtone, which could not be heard by teachers if the phone rang during a class. [13] Mobile phone speakers are capable of producing frequencies above 20 kHz. [14] This ringtone became informally known as "Teen Buzz" [15] or "the Mosquito ringtone" and has since been sold commercially.
Abilities of young people to hear high frequency tones inaudible to those over 25 or so has led to the development of technologies to disperse groups of young people around shops (The Mosquito), and development of a cell phone ringtone, Teen Buzz, for students to use in school, that older
In many cases, the cadence consists of a double ring of 0.4 seconds separated by 0.2 seconds, and a two second pause after which the cadence repeats (0.4s on, 0.2 s off, 0.4 s on, 2 s off). In many cases the tone is a combination of 400 Hz and 450 Hz sine waves.
Each audio section is highlighted with divider lines having handles for touch-dragging. There are also inputs for numerical values for the start and end points and controls to zoom in and out on the waveform. Users can save files as a ringtone, an alarm or a notification. Ringdroid does not have the ability to fade or loop. [1]
Dual-tone multi-frequency signaling (DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. [1]
The Nokia tune is a phrase from a composition for solo guitar, Gran Vals, composed in 1902 by the Spanish classical guitarist and composer Francisco Tárrega. [1] It has been associated with Finnish corporation Nokia since the 1990s, becoming the first identifiable musical ringtone on a mobile phone; Nokia selected an excerpt to be used as its default ringtone.
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