![]() ![]() To use the calculator, simply enter a value. In Europe FM radio has a time constant of 50 µs,īut also in Africa, Asia (without Korea, Taiwan, Thailand), Pacific. Taiwan, Thailand, AFN worldwide and the rest of America. In USA FM radio has a time constant of 75 µs, but also in Korea, Recorded flux that had a "hump" (re the NAB EQ) from about +3 dB at 630 Hz to +8 dB atĢ kHz, back to +3 dB at 5 kHz, and down to −12 dB at 16 kHz see the AME curve: It wasīased on modifying the NAB response with an auditory (hearing) curve, which resulted in a Pre-Emphasis and De-Emphasis or preemphasis and deemphasis There was also an "Ampex Master Equalization" around the year 1958, called AME. The possible pre-emphasis/de-emphasis of a PCM recording for DAT or CD (15/50 µs EIAJ DAT/CD).Īt the cut-off frequency f c of a drop, the voltage V is always fallen to the value Time constant τ in µs = 159155 / f c in Hz ![]() The Greek letter for the time constant is tau = τ and 1 microsecond is 10 −6 seconds.Ĭut-off frequency f c in Hz = 159155 / τ in µs ![]() You will see the program but the function will not work.įill in the box above and click at the appropriate 'calculate' below. Preemphasis and deemphasis - Frequency and angular frequencyĬonversion : time constant τ to cut-off frequency f c andĬut-off frequency (corner frequency) f c to time constant τĬut-off frequency = corner frequency = break frequency The used browser does not support JavaScript.
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