[ENG ACOUS] An acoustic horn in which the path from throat to mouth is folded or curled to give the longest possible path in a given volume.


Related Terms

PERIDYNAMIC LOUDSPEAKER

[ENG ACOUS] Boxtype loudspeaker baffle designed to give good bass response by minimizing acoustic standing.

NOMINAL PASS-BAND CENTER FREQUENCY

The geometric mean of the nominal upper and lower cutoff frequencies of an acoustic or electric filter.

NOMINAL BANDWIDTH

The difference between the nominal upper and lower cutoff frequencies of an acoustic or electric filter.

MOD ROOM

[ENG ACOUS] A control room in a sound-recording studio in which the acoustic treatment comprises a uniform disposition of the sound-absorbent material all about the room.

MAGNETIC LOUDSPEAKER

[ENG ACOUS] Loudspeaker in which acoustic waves are produced by mechanical forces resulting from magnetic reactions. Also known as magnetic speaker.

LINE HYDROPHONE

[ENG ACOUS] A directional hydrophone consisting of one straight-line element, an array of suitably phased elements mounted in line, or the acoustic equivalent of such an array.

INDUCTION SILENCER

A device for reducing engine induction noise, which consists essentially of a low-pass acoustic filter with the inertance of the air-entrance tube and the acoustic compliance of the annular and central volumes providing acoustic filtering elements.

HYDRODYNAMIC OSCILLATOR

[ENG ACOUS] A transducer for generating sound waves in fluids, in which a continuous flow through an orifice is modulated by a reciprocating valve system controlled by acoustic feedback.

HOWL

[ENG ACOUS] Undesirable prolonged sound produced by a radio receiver or audiofrequency amplifier system because of either electric or acoustic feedback.

ACOUSTIC

A term pertaining to sound, or the science of sound.

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