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Glossary – H


An effect concerned with the apparent location of the source when the same sound is heard from two or more sources (as in a public address system). Within certain limits of the relative intensities of the separate sounds, and of the time intervals between their arrivals, the sound appears to come from a single source, namely that from which the sounds first arrive, even though the later sounds are more intense.
A frequency component of a complex waveform that bears an integral relation to the fundamental frequency. A harmonic having double the fundamental frequency is called the second harmonic and so on. Also called overtone.
Acoustic distortion, unwanted changes resulting from nonlinear relation between input and output at a given frequency.
Electromagnetic device used in magnetic tape recording to convert an audio signal to a magnetic pattern, and vice versa.
The space between pole pieces in a head.Head, erase -- The head that is used to apply a gradually diminishing magnetic force to the tape, thus erasing it just prior to recording.
Losses in frequency response that are a function of head design limitations.
The head that is used to detect the tape's magnetic field.
The head that is used to apply a magnetic force to the tape.
A metal shield around the playback head, designed to protect it from stray magnetic fields.
The record head, when used for playback during Sel-Sync sessions.
Small sound reproducers resembling miniature speakers used either singly or in pairs, usually attached to a headband to hold the phones snugly against the ears.
Amount of increase above the working level which can be tolerated by an amplifier or tape etc. before the onset of overload distortion.
A resonator consisting of a cavity in a rigid structure communicating by a narrow neck or slit to the outside air. Note. The frequency of resonance is determined by the mass of air in the neck resonating in conjunction with the compliance of the air in the cavity.
A unit of frequency equal to 1 cycle per second (cps).
The characteristic that enables an audio system to reproduce sound as nearly like the original as possible.
In a tape recorder, distortion caused by strong high-frequency signals combining to produce undesired new tones. Also called high frequency intermodulation distortion.
A high sensitivity tape.
An electronic filter used in audio circuits to attenuate all frequencies below a particular chosen frequency. Frequencies above the cutoff are passed without attenuation.
A mechanical or electromechanical recording in which the modulation is perpendicular to the surface of the recording medium.
High frequency random noise.
The lower volume or absence of sound between the left and right speakers of a stereo system.
Also called an acoustic horn. A tubular or rectangular enclosure for radiation of acoustic waves.
A frequency below which an exponential horn will not function correctly because it fails to provide for proper expansion of the sound waves.
A speaker system in which the horn is folded over on itself to conserve space. See Baffle, Folded.
A method of coupling a speaker diaphragm of the listening space by an expanding air column that has a small throat and a large mouth.
The wide end of a horn.
A horn cluster, designed to provide a wide radiation angle.
A speaker in which a horn couples the radiating element of the medium.
The narrow end of a horn.
Instability in a sound reinforcement or other system when feedback is allowed to build up between the output and input.
The center of a tape reel, around which the tape is wound.
Noise generated in an audio or other electronic device by a source or sources of electrical disturbance.
Fault condition, where the transport mechanism or motor is alternately reaching synchronous speed and falling back again in rhythmic fashion.
Type of transformer having two secondary windings with minimum crosstalk between them; used to split signal to 'echo send' for example.
Polar response of microphone, intermediate between figureof-eight and true cardioid.
A graph of magnetizing force vs. remanent magnetization.


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Customer Testimonials
"Got the CDs today, thanks. Man, you did an awesome job! They sound great, and the packaging is excellent! Really nice work. The quality is indeed top notch! I'm sure any customers will be thrilled with your work. I'll be sure to forward any and all requests for 8track duplicating your way."