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There are a number of free sound effects resources of public domain or free content sound recordings appropriate for Wikipedia use available online, and as well as in other contexts. All files should be converted to ogg , Wikipedia's patent-free format of choice.
The high frequencies may be the same volume as – or louder than – the low frequencies when sent across the line. The loudness difference between the high and low frequencies can be as large as 3 decibels (dB) and is referred to as "twist." The duration of the tone should be at least 537 ms. [1]
A ringtone maker is an application that converts a user chosen song or other audio file for use as a ringtone of a mobile phone. The ringtone file is installed in the mobile phone either by direct cable connection, Bluetooth, text messaging, or e-mail. On many websites, users may create ringtones from digital music or audio.
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.
Many European, Asian, and Latin American countries use tones that follow or take inspiration from the ETSI recommendations. Almost all of these tones have a frequency of 425 Hz. France uses a slight variation with a higher pitch 440 Hz tone and a cadence of one second of tone followed by three to five seconds of silence.
Most notably, the engine was used on most Nokia phones of the time to play the polyphonic version of the Nokia tune arranged by Ian Livingstone (often falsely attributed as being Dolby's own work), who created several polyphonic arrangements of Nokia's monophonic ringtones. [28] The first phone to ship with the engine was the Nokia 3510 ...
The Precise Tone Plan for the North American Numbering Plan of the US, Canada, and various Caribbean nations specifies a combination of two tones (350 Hz and 440 Hz) which, when mixed, creates a beat frequency of 90 Hz. The UK dial tone is similar, but combines 350 Hz and 450 Hz tones instead, creating a 100 Hz beat frequency.
Isochronic tones can quantitatively be distinguished by both the frequency or pitch of the tone itself, and by the interval or frequency of repetition of the tone. While listening to isochronic tones is a technique often employed in the theoretical practice of brainwave entrainment, reliable scientific research into the effectiveness of this ...
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