The New Encyclopaedia Britannica, Volume 9 |
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Page 21
The intensity of a sound wave from a point source varies inversely as the square
of the distance from ... An air siren produces sound waves by interrupting jets of
air at different rates, by means of a rotating disk with orifices in its periphery.
The intensity of a sound wave from a point source varies inversely as the square
of the distance from ... An air siren produces sound waves by interrupting jets of
air at different rates, by means of a rotating disk with orifices in its periphery.
Page 23
Thus the compressional wave velocity in a steel rod is many times that in a lead
rod, as the density of steel is less than that for lead, and the Young's modulus for
steel is about 13 times that of lead. For a three-dimensional solid—i.e., one not in
...
Thus the compressional wave velocity in a steel rod is many times that in a lead
rod, as the density of steel is less than that for lead, and the Young's modulus for
steel is about 13 times that of lead. For a three-dimensional solid—i.e., one not in
...
Page 27
When a sound wave strikes an obstacle of finite size, some of the sound energy
is reflected, some is transmitted into the obstacle, and some gets around the
obstacle and is said to be diffracted. It is customary to say that the original beam
of ...
When a sound wave strikes an obstacle of finite size, some of the sound energy
is reflected, some is transmitted into the obstacle, and some gets around the
obstacle and is said to be diffracted. It is customary to say that the original beam
of ...
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