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Glossary and Terms T Thru Z
– 1) A point of connection between two wires including a device on
the end of a wire or cable that allows attachment and the accepting
point on a case of the equipment. 2) A computer keyboard and monitor
that allows access and entry of information into or from a
- To have an amplifier feed a resistance (usually a resistor) that
matches the output impedance of the amplifier.
Speaker - A speaker system that has
separate speakers to reproduce the bass, mid-range and treble
of Feeling - The sound pressure level at
which people feel discomfort 50 percent of the time.
of Hearing - The sound pressure level at which people
can hear only 50 percent of the time.
of Pain - The sound pressure level at
which people feel actual pain 50 percent of the time.
- The small opening in a horn or in a driver through which
the sound pressure wave passes from the driver to the horn.
- In speakers and in microphones, the amount of movement
that the diaphragm can make (without restriction) to produce or
pickup the sound wave.
- Cables with connectors at both ends, usually run through walls or
floors, so that a signal can be sent or picked up from some remote
- Short for SMPTE Time Code (a standardized timing and sync signal
specified by the Society of Motion Picture and Television
Code Generator - A unit that generates
SMPTE time code signals.
1) One of several single-frequency signals at the beginning of a
tape reel at the magnetic reference level that will be used to
record the program. 2) Any single-frequency signal or sound. 3) The
sound quality of an instrument's sound relative to the amount of
energy present at different frequencies. 4) In some synthesizers, a
term meaning the audio signal that will be put out by the unit which
would be similar to the sound of an instrument.
- The pivoting arm mounted to the base of a turntable to hold the
phono cartridge and allow it to advance across the phonograph record
- An electrical device that has two coils that are
Matrix - A
device which uses transformers to take two audio channel inputs and
change them to a sum signal (a mix of the signals on the two
channels) and a difference signal (the mixture of the two signals
with one channel phase reversed so that any signal exactly the same
in both channels will be cancelled).
Trap - A
filter designed to reject audio signals at certain frequencies
Tube - A
shortening of the term Vacuum Tube (an amplifying device that has
elements to send and control current through a vacuum in a glass or
- Regarding a circuit or device, which is most sensitive to
a certain frequency.
- A cavity that, because of its physical dimensions, will resonate
at a particular frequency (tend to reinforce the energy at certain
frequencies of vibration).
Tweak - A
slang term for calibration (a setting of all operating controls and
adjustments for optimum performance of a device) especially very
- A speaker designed to reproduce the higher frequencies only.
Speaker - A speaker system with separate
speakers to reproduce the lower frequencies (woofer) and to
reproduce the higher frequencies (tweeter).
A method of interconnecting recorders, amplifiers and other
electronic gear using two-conductor cable.
A prefix meaning One.
- A pick-up pattern which is more sensitive to sound
arriving from one direction than from any other.
- An amplifying device that is a tube.
Tube Volt Meter - A device that measures the electrical
voltage and uses a vacuum tube to drive the indicator so that
testing the circuit does not load tbe circuit.
Virtual FIG - A newer
method of implementing Focused Image Geometry, which accomplishes
the same goals but does so by pointing the crossover null toward the
walls, rather than using an angled front enclosure. See
Voice Coil - A coil
of wire tightly wrapped wound around a circular cylinder, known as a
former, near to a magnet at the back of a loudspeaker. The wire
begins at the inside of a speaker terminal, continuing the signal
path carried by speaker wires, and ends by being attached -- usually
glued -- to the back of the speaker diaphragm.
When AC current passes through the
voice coil, an alternating magnetic field arises that interacts with
the fixed field of the magnet to produce an alternating force
which in turn drives the speaker diaphragm back and forth.
symbol V or E) is the difference in electrical charge or
potential between two objects or points that causes current to flow
in a circuit. Also known as electromotive force (E) it is
measured in volts (V). "Voltage is electrical
pressure" an analogy would be the force that is pushing the
water in a pipe forward.
Wattage (Watts, symbol
W or P) - the total electrical power of a device. Doing any
work requires a certain amount power, and achieving results through
electricity is no different. Electrical power is defined as
the rate at which electrical energy is able to produce effects in
another usable form such as motion, heat, or sound.
Electrical power consists of
voltage multiplied by amperage, and its common symbol is the
uppercase letter P. The standard unit of measurement is the
watt, symbolized by an uppercase W, and power expressed in watts is
sometimes referred to as wattage. 10000 W = 1 killowatt, or
kW; this magnitude of measurement is often used in utility circuits.
Wave - A
continuous fluctuation in the amplitude of a quantity with respect
- The time it takes for one point of the waveform to travel a
- The shape made by the fluctuations of a quantity over
- The shape made by the fluctuations of a quantity over
- The length of one cycle (in feet, inches, etc.)
- A random energy where there is an energy distribution so that the
amount of energy is the same for each cycle, causing the noise level
to increase with frequency.
Noise - Noise that has energy over a wide range of
Another term for Depth (the amount of change in the controlled
signal by the control signal).
- A speaker that is designed to reproduce bass frequencies
Connector – 1) A common 3 pin connector used in
balanced audio connections. 2) A microphone Cable.
- A cable with three connectors so that one output may be
sent to two inputs.
& Granite Audio
Salem, OR 97303
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