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  2. Philips SAA1099 - Wikipedia

    en.wikipedia.org/wiki/Philips_SAA1099

    The Philips SAA1099 sound generator is a 6-voice sound chip used by some 1980s devices. [1] [2] [3]It can produce several different waveforms by locking the volume envelope generator to the frequency generator, and also has a noise generator with 3 preset frequencies which can be locked to the frequency generator for greater range.

  3. DTMF - Wikipedia

    en.wikipedia.org/wiki/DTMF

    Dual-tone multi-frequency signaling (DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. [1]

  4. Voice frequency - Wikipedia

    en.wikipedia.org/wiki/Voice_frequency

    In telephony, the usable voice frequency band ranges from approximately 300 to 3400 Hz. [2] It is for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz is also referred to as voice frequency, being the electromagnetic energy that represents acoustic energy at baseband.

  5. Texas Instruments SN76489 - Wikipedia

    en.wikipedia.org/wiki/Texas_Instruments_SN76489

    The SN76489 [1] Digital Complex Sound Generator (DCSG) is a TTL-compatible programmable sound generator chip from Texas Instruments. [2] Its main application was the generation of music and sound effects in game consoles , arcade video games , and home computers ( TI-99/4A , BBC Micro , ColecoVision , IBM PCjr , Tomy Tutor , Master System ...

  6. Signal generator - Wikipedia

    en.wikipedia.org/wiki/Signal_generator

    A signal generator is one of a class of electronic devices that generates electrical signals with set properties of amplitude, frequency, and wave shape. These generated signals are used as a stimulus for electronic measurements, typically used in designing, testing, troubleshooting, and repairing electronic or electroacoustic devices, though it often has artistic uses as well.

  7. Programmable sound generator - Wikipedia

    en.wikipedia.org/wiki/Programmable_sound_generator

    A programmable sound generator (PSG) is a sound chip that generates (or synthesizes) audio wave signals built from one or more basic waveforms, and often some kind of noise. PSGs use a relatively simple method of creating sound compared to other methods such as frequency modulation synthesis or pulse-code modulation .

  8. Sound level meter - Wikipedia

    en.wikipedia.org/wiki/Sound_level_meter

    The output of the generator is fed to a transducer in a half-inch cavity into which the sound level meter microphone is inserted. The sound level generated is 94 dB, which corresponds to a root-mean-square sound pressure of 1 pascal and is at a frequency of 1 kHz where all the frequency weightings have the same sensitivity.

  9. Electrical characteristics of dynamic loudspeakers - Wikipedia

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

    This system has a characteristic mass and stiffness, and a resonant frequency at which the system will vibrate freely. This frequency is known as the "free-space resonance" of the loudspeaker and is designated by F s. At this frequency, the voice coil is vibrating in the speaker's magnetic field with maximum peak-to-peak amplitude and velocity.

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