- standard reference frequency
- <el> ■ Normvergleichsfrequenz f
English-german technical dictionary. 2013.
English-german technical dictionary. 2013.
Reference tone — A reference tone is a pure tone corresponding to a known frequency, and produced at a stable sound pressure level (volume), usually by specialized equipment.In mediaThe most common reference tone in audio engineering is a Audio|1000Hz.ogg|1000 Hz … Wikipedia
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Frequency standard — A frequency standard is a stable oscillator used for frequency calibration or reference. A frequency standard generates a fundamental frequency with a high degree of accuracy and precision. Harmonics of this fundamental frequency are used to… … Wikipedia
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A440 (pitch standard) — For other uses, see A440. A440 Play (help· … Wikipedia
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Utility frequency — The waveform of 230 volt, 50 Hz compared with 110 V, 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency at which alternating current (ac, also AC) is transmitted from a… … Wikipedia