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es of changes, as in the changes of motion of one of the particles constituting a wave or vibration; one portion of a series of such changes, in distinction from a contrasted portion, as the portion on one side of a position of equilibrium, in contrast with that on the opposite side.

hin enough to give colored bands, the form and position of which are affected by sonorous vibrations.

the soft material, and these, when the cylinder or disk is again turned, set the plate in vibration, and reproduce the sound.

An instrument for measuring sounds, as to their intensity, or the frequency of the vibrations.

An instrument in which motion is produced by the vibrations of a sounding body.

An instrument for producing luminous figures by the vibrations of sounding bodies.

The relative acuteness or gravity of a tone, determined by the number of vibrations which produce it; the place of any tone upon a scale of high and low.

egularly repeated, as of a medium in the transmission of light, sound, etc.; oscillation; vibration; pulsation; impulse; beat; movement. The measured pulse of racing oars. Tennyson. When the ear receives any simple sound, it is struck by a single pulse of the air, which makes the eardrum and the other membranous parts…

Especially, to shake the voice; to utter or form sound with rapid or tremulous vibrations, as in singing; also, to trill on a musical instrument

small piece of cane or wood attached to the mouthpiece of certain instruments, and set in vibration by the breath. In the clarinet it is a single fiat reed; in the oboe and bassoon it is double, forming a compressed tube.

in a watch, which controls the effective length of the hairspring, and thus regulates the vibrations of the balance. (b) The governor of a steam engine. (c) A valve for controlling the admission of steam to the steam chest, in a locomotive.

walls of which are not distant enough to return a distinct echo, or by the production of vibrations in other bodies, as a sounding-board, or the bodies of musical instruments. Pulmonary resonance (Med.), the sound heard on percussing over the lungs. -- Vocal resonance (Med.), the sound transmitted to the ear when aus…

given which in the other is sought; as, finding the length of a pendulum from its time of vibration is the reverse operation to finding the time of vibration from the length.

by rhonchi. Rhonchial fremitus. Etym: [L. fremitus a dull roaring or murmuring.] (Med.) A vibration of the chest wall that may be felt by the hand laid upon its surface. It is caused in the production of rhonchi in the bronchial tubes.

To cause to move with quick or violent vibrations; to move rapidly one way and the other; to make to tremble or shiver; to agitate. As a fig tree casteth her untimely figs, when she is shaken of a mighty wind. Rev. vi. 13. Ascend my chariot; guide the rapid wheels That shake heaven's basis. Milton.

n or coal gas, burning within a tube and so adjusted as to set the air within the tube in vibration, causing sound. The apparatus is called also chemical harmonicon. -- Singing master, a man who teaches vocal music. -- Singing school, a school in which persons are instructed in singing.

instrument for producing musical tones and for ascertaining the number of sound waves or vibrations per second which produce a note of a given pitch. The sounds are produced by a perforated rotating disk or disks. A form with two disks operated by steam or highly compressed air is used sounding an alarm to vessels in…

respiring through the open mouth so that the currents of inspired and expired air cause a vibration of the uvula and soft palate, thus giving rise to a sound more or less harsh. It is usually unvoluntary, but may be produced voluntarily.

An instrument for exhibiting the transverse vibrations of cords, and ascertaining the relations between musical notes. It consists of a cord stretched by weight along a box, and divided into different lengths at pleasure by a bridge, the place of which is determined by a scale on the face of the box.…

ity, deep- toned; as, sonorous rhonchi. Sonorous figures (Physics), figures formed by the vibrations of a substance capable of emitting a musical tone, as when the bow of a violin is drawn along the edge of a piece of glass or metal on which sand is strewed, and the sand arranges itself in figures according to the musi…