Phonograph Needle

Also found in: Dictionary, Thesaurus, Wikipedia.

phonograph needle

[′fō·nə‚graf ‚nēd·əl]
(engineering acoustics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Phonograph Needle


a component of the tone arm that picks up mechanical vibrations as it moves along the grooves of a record. Phonograph needles are usually cylindrical, narrowing into a cone. The cone ends in a hemisphere, which is the working part of the needle. A distinction is made between fixed needles, which cannot be removed from their holder, and replaceable needles, which are fastened by a screw to the diaphragm in old-style sound pickups. Fixed needles are made from corundum or diamond. Corundum needles last about 150 hours; diamond needles last ten times longer. Replaceable steel needles with a service life of about five minutes were used to reproduce recordings from 78-rpm phonograph records.


Apollonova, L. P., and N. D. Shumova. Mekhanicheskaia zvuko-zapis’. Moscow-Leningrad, 1964.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Piezoelectric crystals transform pressure or motion into electricity when they are compressed or vibrated; phonograph needles are one common example.
In order to afford those shiny new 2-ounce .380's the size of Zippo lighters or 4-shot monster revolvers which use 20mm cases necked down to fire carbide phonograph needles at 17,000 feet per second, they'll be selling those red-headed stepchild guns--the ones they put one box of ammo through before losing interest, often dumping them for chump-change.
Its hard-wearing properties are used in fountain pen nibs, phonograph needles and electrical contacts.
There will be at least four tables occupied by guys trying to sell sixguns chambered for a 20mm cannon shell necked down to shoot carbide phonograph needles at 84,000 feet per second.