A440 (pitch standard)
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What links here
Pure tone
Monotone
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Audio frequency
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Sine wave
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Absolute threshold of hearing
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Combination tone
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Missing fundamental
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Telephone keypad
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Q factor
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Phon
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Evoked potential
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Pitch (music)
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Hermann von Helmholtz
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Isochronous timing
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ZX Spectrum
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Tuning fork
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Tone
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Harmonic series (music)
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DTMF signaling
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