Philips WAC7505 Frequency Response, Hi-Fi High Fidelity, Incredible Surround Sound Incr.Surr

FM (Frequency Modulation)

In radio broadcasting: a method of modulation in which the frequency of the carrier voltage is varied with the frequency of the modulation voltage.

Frequency

The property or condition of occurring at frequent intervals. In sound, this simply refers to the regular occurrence of compression and rarification of air that we experience as sound.

Frequency Response

Is the range of frequencies that a speaker reproduces, lowest frequency to the highest. While the optimal normal is 20-20,000 Hz (Hertz), the range of human hearing for individuals is often much more restricted.

A good full-range speaker system however, reproduces as much of this range as possible to cover all variations. Individual drivers are limited to reproduce only that part of the spectrum for which they were made, so their response is limited, but still a necessary point to consider when designing a complete sound system.

H

Hi-Fi (High Fidelity)

A method of sound reproduction that emphasizes the highest possible adherence to the exact character of the original sound.This is a principal that must be paramount in every stage of the recording, transportation, and recreation of the signal to be fully operational. It is usually the listener’s equipment wherein this objective is most seriously compromised.

Hz (Hertz)

Cycles per second, named after Heinrich Hertz.

I

Impedance

The resistance to the flow of an electric current in a circuit.This is effectively the electrical load that a loudspeaker presents to the amplifier which drives it and is measured in ohms.

Incredible Surround Sound (Incr.Surr.)

An improved system that creates realistic, three- dimensional sound fields.These sound fields are usually achieved with multiple speakers that are arranged around the listener.

Input sensitivity

SPL (sound pressure level) a speaker produces, given one watt of power, measured from a one-meter distance at a typical input frequency (usually 1kHz unless otherwise noted on the speaker).

Interface

A device or protocol which facilitates the linking of any two devices or systems; or when used as a verb (‘to interface’), the process of linking.

IP address

An IP (Internet Protocol) address is a unique computer address that enables electronic devices to communicate with and identify each other.

K

Kbps

Kilobits per second. A digital-data-rate measurement system which is often used with highly compressed formats such as AAC, DAB, MP3 etc.The higher the amount, the better the quality generally is.

K

kHz (kilo Hertz)

1000Hz or 1000 cycles per second.

L

LCD (Liquid Crystal Display)

Probably the most common way to show visual information on non-computer electronic equipment.

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