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  2. Ringtone - Wikipedia

    en.wikipedia.org/wiki/Ringtone

    Ringing noise from an electromechanical telephone Example of a short digital tune which could be used as a ringtone on a mobile phone. A ringtone is the sound made by a telephone to indicate an incoming telephone call. Originally referring to the sound of electromechanical striking of bells or gongs, the term refers to any sound by any device ...

  3. Ring (company) - Wikipedia

    en.wikipedia.org/wiki/Ring_(company)

    A second-generation model, Ring Doorbell 2, was released in 2017, with updated hardware and a 1080p camera with improved low-light performance, that does not rely solely on Wi-Fi, unlike the original model. [44] The Ring Doorbell Pro interoperates with Amazon Alexa to play prerecorded greetings to visitors and allow visitors to leave a message ...

  4. Ring Tone Text Transfer Language - Wikipedia

    en.wikipedia.org/wiki/Ring_Tone_Text_Transfer...

    Ring Tone Text Transfer Language (RTTTL) is a text-based format that was developed by Nokia [citation needed] to be used to transfer ringtones to Nokia cellphones. The RTTTL format is a string divided into three sections: name, default value, and data. The name section consists of a string describing the name of the ringtone. It can be no ...

  5. Nokia tune - Wikipedia

    en.wikipedia.org/wiki/Nokia_tune

    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.

  6. Ringing tone - Wikipedia

    en.wikipedia.org/wiki/Ringing_tone

    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.

  7. NBC chimes - Wikipedia

    en.wikipedia.org/wiki/NBC_chimes

    The NBC chimes are a sequence of three tones played on National Broadcasting Company (NBC) broadcasts. Originally developed in 1927 as seven notes, they were standardized to the current three-note version by the early 1930s, and possibly as early as 1929.