Sound system term explanation

DECAY TIME Decay time is the time for the signal to decay by 60DB

DE-ESSER wide-band selective high-frequency compression is a compressor specially used for vocals. It usually only works in the high frequency range above 3KHZ or 4KHZ. It is especially used in the broadcasting industry. It can be eliminated because it is too close to the microphone. (Microphone) The human voice, hiss.

DIGITAL

DIRECT BOX is directly connected to the box. When recording, convert unbalanced signals such as guitars, bass or keyboard instruments into balanced signals and send them to electronic equipment of the network mixer (mixer), which usually requires batteries or phantom power to work.

The form of DIRECT RADIATOR direct radiating horn without a horn between the moving element and the air is called direct radiating horn. Most household horns are direct radiating horns. Most of the horns are horns. The sound of direct radiating horns is relatively smooth and the frequency is corresponding. Also very average.

DIFFERENTIAL AMPLIFIER differential amplifier

The design of the differential amplifier makes the interference induced by the balanced wiring cancel each other out. Because the positive and negative signals are very close, the two lines will induce the same interference, while the differential amplifier only amplifies the two signal lines. Different signals, so any same signal (noise) that appears on both positive and negative lines at the same time will not be amplified. This is the common-mode mutual exclusion phenomenon known to everyone. COMMON MODE REJECTION

DISPERSION The angle at which the speaker diffuses the sound is called the diffusion angle.

The receiver of the DIVERSITY RECEIVER wireless microphone must have two antennas. Why do you need a pair of antennas? Because these radio signals will be attenuated or reflected by buildings, cars, and walls, radio wave signals of different phases interfere with each other, so that the signals are not measured, and the two antennas are located at different positions, and they will receive signals of different strengths, and they will be sent to the built-in. The two receivers are then compared to select the stronger signal.

DRIVER Driver A single speaker unit can be called a driver. However, in addition to the horn, other parts of the horn-type speaker system can be called a driver.

DROPOUT tape signal drops

DRY The signal that has not been processed when the effect is used is called DRY, and the signal that has been processed by the effect is called WET.

DUB Copy Copying a tape or CD is called DUB, and the copying process is called DUBBING

DYNAMIC RANGE The dynamic range of the sound is the volume ratio between the loudest sound and the smallest sound. The unit of measurement is DB. The dynamic range of a symphony performance is about 90DB, which means that the loudest sound volume is 90DB higher than the low sound volume. The dynamic range is a kind of The ratio has nothing to do with the volume. Usually in FM radio programs, you cannot feel the dynamic power of live symphony performance, because the storage or transmission medium itself has uneliminated noise, so it determines the lowest volume of the music itself (must be greater than the noise volume), and the highest level of music. The volume may be compressed because of the system's protection measures to prevent peak clipping and distortion. CD records can provide a larger dynamic range. However, in the broadcasting system, because of the bandwidth, the radio station will use a compression limiter to reduce the dynamics of the music. Play out after the range.