瘋暈

發表人 **Melvin Woo** 發表於 2005-12-10, 02:45

續...........瘋暈音响字典..............

Capacitance

The physical property of a circuit component that permits it to store an electric charge, a potential difference, between elements within that circuit. The unit of capacitance is the farad.

Cathode

The negative electrode. In a tube it is element that emits electrons.

Class A

Whether the signal swings positive or negative, the sole output device handles all of the output waveform.

Class AB

Each output device handles only a little more than half of the output waveform.

Class B

Each output device handles exactly half of the output waveform

Class C

Each output device handles only a little less than half of the output waveform

Closed Box Speaker

A loudspeaker enclosure that is sealed, which prevents the woofers output from canceling with its back-wave. If it is very large, it is called an infinite baffle; or if small, an acoustic suspension cabinet.

Compliance

The opposite of stiffness. The mechanical and acoustical equivalent of capacitance. With regard to speaker cones, it refers to the springiness exhibited when a force is applied to it.

Crossover

An electrical network that is used to divide the signal delivered to a speaker into two or more bands.

DC

Direct current. A flow of electricity proceeds continuously in one direction solely.

Decibel

Abbreviated dB. A unit of change in amplitude. In acoustic terms it is the smallest increment that can be heard. In electrical terms it is equal to dB = 10 log P1/P2 and dB = 20 log E1/E2.

Diode

AKA rectifier. An electronic device that allows for the flow of current in only one direction. Diodes can be made from Vacuum tubes and solid state devices.

Distortion

The departure of the reproduced signal from the input signal. Of course, one man's distortion can be another man's bloom, sweetness, warmth, and fluidity.

Driver

A loudspeaker unit that converts the signal from the amplifier into sound.