One means of communication is found in certain movements of the atmosphere, known as sound waves.
The first is an instrument for the production of sound waves; the second is the sense organ which enables the sound waves to act as stimuli to the nervous system.
When it is recognized that such widely different forces as light waves, sound waves, heat, pressure, and odors are enabled by them to stimulate neurons, the importance of these organs becomes apparent.
A diaphragm flexed by sound waves closes an electric circuit and starts the operation of a machine.
In addition to machines that talk we have machines that hear--machines that will respond to sound waves.
Boats have been built whose steering gear may be controlled by sound waves, but as yet nothing of commercial importance has been developed in machines controlled by sound.
Then, at any time by the principle of “reversal,” the record could be made the transmitter instead of the receiver of sound waves, and it would actuate the ear so that it would repeat the sound vibrations it had formerly received.
An anvil, metal and glass disks, and bell-shaped cylinders were employed in studying the movements of sound waves.
Vibration of Diaphragms:--Sound waves in air have the power to move other diaphragms than that of the ear.
Sound waves in air travel at a rate of about 1,090 feet per second.
The propagation of sound waves in a vacuum may be said not to take place at all.
The rate of propagation of sound waves in other materials varies with the density of the material.
Now in all wave motion, whether it be water waves or sound waves, that which is propagated or conveyed from place to place is energy, or motion.
In order to account for this wave motion, he supposed all space to be filled with a luminiferous Aether, which would be to his light waves what air is to sound waves.
The oscillations then flow through the closed circuit where they are rectified by the crystal detector and transformed into sound waves by the telephone receiver as described in connection with Set No.
Now electric oscillations set up in two circuits that are coupled together act in exactly the same way as sound waves produced by two tuning forks that are close to each other.
During the past year I have made a very complete series of photographs of sound waves, which illustrate in a most beautiful manner the fundamental principles of wave motion.
To see a noise' certainly sounds like an absurdity; yet under certain conditions, sound waves in air can be made as distinctly visible as the ripples on a pond surrounding the splash of a stone.
Sound waves in air, as given out by the piano, vary in length from, say, four inches to forty feet, those having the shorter wave length being the higher pitched tones.
Sound waves travel in air at the rate of one mile in five seconds.
Sound waves of various lengths (of high and low pitch) all travel at the same speed (one mile in five seconds), else how would the piccolo and the bass horn of the distant band sound together.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "sound waves" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
