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  2. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    Steady, short beeps Power supply may be bad Long continuous beep tone Memory failure Steady, long beeps Power supply bad No beep Power supply bad, system not plugged in, or power not turned on No beep If everything seems to be functioning correctly there may be a problem with the 'beeper' itself. The system will normally beep one short beep.

  3. Beep (sound) - Wikipedia

    en.wikipedia.org/wiki/Beep_(sound)

    A beep is a short, single tone, typically high-pitched, generally made by a computer or other machine.The term has its origin in onomatopoeia.The word "beep-beep" is recorded for the noise of a car horn in 1929, and the modern usage of "beep" for a high-pitched tone is attributed to Arthur C. Clarke in 1951.

  4. Greenwich Time Signal - Wikipedia

    en.wikipedia.org/wiki/Greenwich_Time_Signal

    There are six pips (short beeps) in total, which occur on each of the 5 seconds leading up to the hour and on the hour itself. Each pip is a 1 k Hz tone (about a fifth of a semitone above musical B5) the first five of which last a tenth of a second each, while the final pip lasts half a second. The actual moment when the hour changes – the ...

  5. Train horn - Wikipedia

    en.wikipedia.org/wiki/Train_horn

    Train horns are sounded where a whistle post (marked with the letter "S" for siffler – "to whistle") is present. If the whistle post is labelled "J" (meaning jour – "day"), the horn is only to be sounded between 07:00 and 20:00. Horns must also be sounded when passing an oncoming train, and shortly before reaching the last car of the train.

  6. Beep line - Wikipedia

    en.wikipedia.org/wiki/Beep_line

    [17] [16] [10] Beep lines proved infectiously popular in the 1960s and 1970s; for example, New England Telephone in 1963 reporting a sharp uptick in busy signal calls in one week (from 1,495 to 27,928) after a beep line number was published in a teen weekly, according to Time magazine. [10]

  7. PC speaker - Wikipedia

    en.wikipedia.org/wiki/PC_speaker

    However, by carefully timing a short pulse (i.e. going from one output level to the other and then back to the first), and by relying on the speaker's physical filtering properties (limited frequency response, self-inductance, etc.), it is possible to drive the speaker to various intermediate output levels, functioning as a crude digital-to ...

  8. Powell predicts a time when mortgages will be impossible to ...

    www.aol.com/finance/powell-predicts-time...

    A growing property insurance crisis may make it hard to get a mortgage in parts of the country in the coming decades, Federal Reserve Chairman Jerome Powell said Tuesday in testimony before Congress.

  9. Call-progress tone - Wikipedia

    en.wikipedia.org/wiki/Call-progress_tone

    Post-answer tones Frequency definition Tone cadence Recording: 1400 Hz: 0.425 s burst, 15 s interval Call waiting: 425 Hz or 525 Hz: 0.2 s on, 0.2 s off, 0.2 s on, 4.4 s off Conference: 425 Hz or 525 Hz or 1400 Hz: 1.0 s on, 15 s off (1st), 0.36 s on, 15 s off (subsequent) Number unobtainable tone: 425 Hz: 2.5 s on, 0.5 s off