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  2. Tone indicator - Wikipedia

    en.wikipedia.org/wiki/Tone_indicator

    On the internet, one or more tone indicators may be placed at the end of a message.A tone indicator on the internet often takes the form of a forward slash (/) followed by an abbreviation of a relevant adjective; alternatively, a more detailed textual description (e. g., / friendly, caring about your well-being) may be used.

  3. Template:Tone indicator - Wikipedia

    en.wikipedia.org/wiki/Template:Tone_indicator

    Displays a tone indicator with hover description Template parameters [Edit template data] Parameter Description Type Status Tone indicator 1 The tone indicator to display, or a valid alias Suggested values con g gq hj hyp j lh lhj nay nbh neg nm nsrs pos ref s srs Default s Example s String required But why? Inferring meaning, tone and intent of a textual message over the internet can be ...

  4. Acoustical measurements and instrumentation - Wikipedia

    en.wikipedia.org/wiki/Acoustical_measurements...

    This signal conditioning may include amplification, filtering, sensor excitation, and input configuration. Another consideration is the frequency range of the instrumentation. It should be large enough to cover the frequency range of signal interest, taking into account the range of the sensor.

  5. Defect detector - Wikipedia

    en.wikipedia.org/wiki/Defect_detector

    A defect detector is a device used on railroads to detect axle and signal problems in passing trains. The detectors are normally integrated into the tracks and often include sensors to detect several different kinds of problems that could occur.

  6. Template:Tone indicator/doc - Wikipedia

    en.wikipedia.org/wiki/Template:Tone_indicator/doc

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  7. Call-progress tone - Wikipedia

    en.wikipedia.org/wiki/Call-progress_tone

    The tone frequencies, as defined by the precise tone plan, are selected such that harmonics and intermodulation products will not cause an unreliable signal. No frequency is a multiple of another, the difference between any two frequencies does not equal any of the frequencies, and the sum of any two frequencies does not equal any of the ...

  8. Stack light - Wikipedia

    en.wikipedia.org/wiki/Stack_light

    Stack light in automated production for in-line quality inspection. Stack lights (also known as signal tower lights, indicator lights, andon lights, warning lights, industrial signal lights, or tower lights) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine's status to machine operators, technicians ...

  9. Off-hook tone - Wikipedia

    en.wikipedia.org/wiki/Off-hook_tone

    Some central office switches in the United States, notably older GTD-5 EAX systems, utilize a single frequency tone, 480 Hz, known as High Tone for this purpose. In either case, the tone is substantially louder than any other signal transmitted over a copper POTS circuit; loud enough to be heard across a room from an unused off-hook telephone.