【 Weak current College 】 audio terminology---Power By 【 China power house network 】

FM (frequencymodulation) FM

A radio broadcast types, it will be the audio waveform as a variation of coding to enter the frequency of the carrier signal. A centre frequency of FM radio for 88.1MHz based audio wave amplitude spread a frequency range from tiny to 88.1MHz to micro-greater than 88.1MHz signal.

Frequency frequency

Vibration or oscillation of the rate of change. The sound is vibration propagation in the air, through a different variation of electrical signal to display: low-pitched voice through the slow change of voltage to display, while the high pitched by rapidly changing to display. Frequency cycles per second or measured in Hz. Audio spectrum can often believe that producing 20-20, 000Hz. In radio frequency technology, refer to radio carrier signal, such as FM radio to AM radio to 88.1MHz or 1, 010KHz.

Frequency response frequency response

Display component how to smoothly to produce audio signal specifications. Typical values are 20 to 20 ± 3dB, 000Hz, indicating that the component can produce low to high and 20 20Hz, 000Hz range sound, but the sound loud and degree of change no more than plus or minus 3dB. If a frequency response indicators does not include error (positive and negative decibel values), the fact that it is meaningless.

Graphicequalizer graphic equalizer

Has a fixed band of the equalizer.

Ground grounding

Theoretical zero potential reference point used to describe a negative connection.

Headroom clearance, free-space

Expressed in decibels, refers to the lowest level of the input signal and the audio device does not correctly handle led to distortion of the maximum levels.

Heads heads

Tape decks of a part. Recording, it produces a magnetic field on tape; playback, it detects the tape on the magnetic field. Most tape decks have independent wiping tone head, by making the tape, magnetic fields and without planning, thus clearing the tone should be recorded.

High-passfilter high-energy filter

A crossover circuit, only allow higher than the expected frequency of frequency signal attenuation through, but lower than the frequency signal frequency point.

Hometheatersystem home theater system

Audio and video components of large gatherings. To achieve true surround sound movie sound effects, lower transfer requires a minimum of four speakers (two in front, two in back). Top-quality system has a Dolby Pro Logic decoder, actually as home theater systems increased front center channel speakers and subwoofer.

HXPro

Means DolbyHXPro Dolby professional clearance.

Hz (hertz) Hz

Frequency standard units to Germany physicist HeinrichHertz naming. Hertz is represented in cycles per second per second or starting from a base state and the recovery of cycles. In the audio range, basic State refers to no sound when the air pressure or its electrical equivalent value (often-level DC signal). Hertz, the greater the value that the higher the pitch.

IC (integratedcircuit) integrated circuits

Contains many transistors and resistors in a small electronic devices, it is the most essential components of the audio component.

IF (intermediatefrequency) rejection frequency suppression

Used to measure the frequency AM or FM tuner inhibits the ability of foreign interference, the higher the number the better.



Contains many transistors and resistors in a small electronic devices, it is the most essential components of the audio component.