Xoro HXS 532 - Инструкция (Страница 25)

STEREO
SUBWOOFER
URROUNDER
SURROUND SOUND
TOTAL HARMONIC DISTORTION
TWEETER
VOICE COIL
From the Greek meaning solid. The purpose of
stereo is not to give you separate right and left
channels, but to provide the illusion of a three-
dimensional, holographic image between the
speakers.
A speaker designed exclusively for low-frequency
reproduction. A true subwoofer should be able to at
least reach into the bottom octave (20-40Hz).
There are many "subwoofers" on the market that
would be more accurately termed "woofers".
The outer suspension of a speaker cone; holds the
diaphragm in place but allows it to move when
activated. Usually made of foam or rubber.
Sound extracted from the stereo signal sent to
smaller rear or side speakers used in a home
theater.
Refers to a series of specifications for surround
sound systems. Professional THX is used in
commercial movie theaters. Home THX
specifications are not published and manufacturers
must sign non-disclosure waivers before submitting
their products for THX certification. Manufacturers
that receive certification for their products must pay
a royalty on units sold.
Refers to a device adding harmonics that were not in
the original signal. For example: a device that is fed a
20Hz sine wave that is also putting out 40Hz, 80Hz
etc. Not usually a factor in most modern electronics,
but still a significant design problem in loudspeakers.
A speaker (driver), used to reproduce the higher
range of frequencies. To form a full-range system,
a tweeter needs to be combined with a woofer, (2-
way system), or a woofer and midrange, (3-way
system).
The wire wound around the speaker former. The
former is mechanically connected to the speaker
cone and causes the cone to vibrate in response to
the audio current in the voice coil.
S (suspension)
THX
(THD)
24
ADDENDUM
SOUND GLOSSARY
VOLUME
WAVELENGTH
WOOFER
Loudness of sound; a subjective sensation dependent
on the amplitude of a sound wave or electrical signal,
but not linearly related to it.
The distance the sound wave travels to complete one
cycle. The distance between one peak or crest of a
sine wave and the next corresponding peak or crest.
The wavelength of any frequency may be found by
dividing the speed of sound by the frequency. (Speed
of sound at sea level is 331.4 meters/second or
1087.42 feet/second).
A speaker, (driver), used for low-frequency
reproduction. Usually larger and heavier than a
midrange or tweeter.