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Sennheiser Glossary
Description
Sennheiser Glossary: an alphabetical list of terms and definitions used in studio recording from the field of acoustics.
AB powering:
Low DC voltage with a high internal resistance for powering condenser microphones connected to pocket transmitters.
AB stereo:
Also known as time delay stereo, time difference stereo. 2-channel stereo recording technique which benefits mainly from the differences in time delay between the microphones (channels). Omni-directional microphones are used in most cases.
Absolute voltage level:
Used in sound studio technology to describe the ratio of a certain voltage Vx to a reference voltage of 0.775V. The absolute level is given in dBu and is calculated as follows: dBu = 20 x log (Vx/0.775). Thus, 0 dBu is equivalent to 0.775V, 6 dBu is equivalent to 1.55V and 15 dBu is equivalent to 4.4V. The current use of dBu relates to a voltage adaptation, while the former use of dBm relates to a power adaptation. The reference voltage of 0.775V is the same for both systems, and is derived from a power of 1mW in a resistance of 600 ohms.
Absorption:
Sound is taken in and converted into heat. Opposite: reflection.
Acoustic amplification:
A weak acoustic signal (e.g. the human voice) may be amplified by using mechanical means. A simple example would be the horn of a gramophone, or horn loudspeakers which are able to produce loud volume levels with little electric power. Further examples would be the bell of a trumpet, the case of a piano or the body of a violin.
Acoustics:
The science of sound.
Active antenna splitter
RF device for connecting several receivers to a single pair of antennas. Includes an antenna booster.
Active antenna:
Antenna with an integrated or attached RF booster which is powered via the antenna cable.
Acute hearing loss:
Suddenly occurring hearing loss or hearing impairment – usually in one ear – caused by interference in the blood supply. It is accompanied by noise in the ear (tinnitus). The condition should be treated quickly in order to prevent the risk of long-term damage.
...
AB powering:
Low DC voltage with a high internal resistance for powering condenser microphones connected to pocket transmitters.
AB stereo:
Also known as time delay stereo, time difference stereo. 2-channel stereo recording technique which benefits mainly from the differences in time delay between the microphones (channels). Omni-directional microphones are used in most cases.
Absolute voltage level:
Used in sound studio technology to describe the ratio of a certain voltage Vx to a reference voltage of 0.775V. The absolute level is given in dBu and is calculated as follows: dBu = 20 x log (Vx/0.775). Thus, 0 dBu is equivalent to 0.775V, 6 dBu is equivalent to 1.55V and 15 dBu is equivalent to 4.4V. The current use of dBu relates to a voltage adaptation, while the former use of dBm relates to a power adaptation. The reference voltage of 0.775V is the same for both systems, and is derived from a power of 1mW in a resistance of 600 ohms.
Absorption:
Sound is taken in and converted into heat. Opposite: reflection.
Acoustic amplification:
A weak acoustic signal (e.g. the human voice) may be amplified by using mechanical means. A simple example would be the horn of a gramophone, or horn loudspeakers which are able to produce loud volume levels with little electric power. Further examples would be the bell of a trumpet, the case of a piano or the body of a violin.
Acoustics:
The science of sound.
Active antenna splitter
RF device for connecting several receivers to a single pair of antennas. Includes an antenna booster.
Active antenna:
Antenna with an integrated or attached RF booster which is powered via the antenna cable.
Acute hearing loss:
Suddenly occurring hearing loss or hearing impairment – usually in one ear – caused by interference in the blood supply. It is accompanied by noise in the ear (tinnitus). The condition should be treated quickly in order to prevent the risk of long-term damage.
...
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Date
Nov 5, 2006
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