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Jan 17, 2000 · dBV (upper case V) Abbreviation for decibels as referenced to voltage. Similar to dBu, dBV specifies a relative voltage level without regard for impedance and is used to measure input and output levels for electronic audio equipment. The reference voltage level, however, is one volt. So one volt equals 0 dBV as opposed to the .775 volts for dBu.
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What is dBV? A logarithmic voltage ratio with a reference voltage of V 0 = 1.0000 volt ≡ 0 dBV The home recording level (consumer audio) of −10 dBV means 0.3162 volts, that is −7.78 dBu. The studio recording level (pro audio) of +4 dBu means a voltage of 1.228 volts. The maximum undistorted level of audio amplifiers is +18 dBu. In USA it ...
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Suffixes are commonly attached to the basic dB unit in order to indicate the reference value by which the ratio is calculated. For example, dBm indicates power measurement relative to 1 milliwatt. In cases where the unit value of the reference is stated, the decibel value is known as "absolute". If the unit value of the reference is not explicitly stated, as in the dB gain of an amplifier, then the decibel value is considered relative.
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dBV (upper case V) Abbreviation for decibels as referenced to voltage. Similar to dBu, dBV specifies a relative voltage level without regard for impedance and is used to measure input and output levels for electronic audio equipment. The reference voltage level, however, is one volt.
The level difference between dBu level and dBV level is Δ L = 2.2 dB. 0 dBV equals 2.2 dBu or 0 dBu equals −2.2 dBV. The conversion from level L(dBu) to voltage (volt) is V = 0.775 × 10(L/20). The conversion from voltage V (volt) to level (dBu) is L = 20 × log (V/0.775).
dBV (upper case V) The reference voltage level, however, is one volt. So one volt equals 0 dBV as opposed to the .775 volts for dBu. The formula for calculations is the same as for dBu: dBV = 20log (V2/V1). The dBV rating is most commonly found in consumer equipment that uses nominal operating levels of -10 dBV.