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  2. Electrolarynx - Wikipedia

    en.wikipedia.org/wiki/Electrolarynx

    Along with developing esophageal voice, using a speech synthesizer, or undergoing a surgical procedure, the electrolarynx serves as a mode of speech recovery for laryngectomy patients. [ 2 ] [ 3 ] The Voice Quality Symbol for electrolaryngeal phonation in speech is И, approximating the symbol for electricity.

  3. Electrical characteristics of dynamic loudspeakers - Wikipedia

    en.wikipedia.org/wiki/Electrical_characteristics...

    The amplifier damping factor, which is the ratio of the nominal load impedance (driver voice coil) to amplifier output impedance, is adequate in either case for well-designed solid state amplifiers. Tube amplifiers have sufficiently higher output impedances that they normally included multi-tap output transformers to better match to the driver ...

  4. Audio power amplifier - Wikipedia

    en.wikipedia.org/wiki/Audio_power_amplifier

    Audio stereo power amplifier made by McIntosh The internal view of a Mission Cyrus One hi-fi integrated audio amplifier (1984) [1]. An audio power amplifier (or power amp) amplifies low-power electronic audio signals, such as the signal from a radio receiver or an electric guitar pickup, to a level that is high enough for driving loudspeakers or headphones.

  5. Compressed air gramophone - Wikipedia

    en.wikipedia.org/wiki/Compressed_air_gramophone

    A pneumatic amplifier was realised by using a sensitive valve, which required little force to operate, to modulate the flow of a stream of compressed air.The basic principle of the valves used in these devices was to pass the stream of compressed air through two partially overlapping combs.

  6. Constant-voltage speaker system - Wikipedia

    en.wikipedia.org/wiki/Constant-voltage_speaker...

    Loudspeaker with attached step-down transformer for use on a constant-voltage system. Constant-voltage speaker systems refer to networks of loudspeakers which are connected to an audio amplifier using step-up and step-down transformers to simplify impedance calculations and to minimize power loss over the speaker cables.

  7. Leslie speaker - Wikipedia

    en.wikipedia.org/wiki/Leslie_speaker

    Older models that used tube power amplifiers use a variety of six-pin connectors, while later models use nine-pin connectors. [20] In all cases, for a single organ – Leslie configuration, the mains power , audio and control signals are all carried on the connector, and the design of the pin layouts varies between organs and speakers.

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