Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 86
her things. 80. Nature of Sound. — Sound waves travel through theair, but we cannot see the effect, since the air is transparent.Suppose that the air were made so we could see it, and that,just as a sound wave passed through it, an instantaneousphotograph were made of the air. How would it look ?… … Figure 57. — A SoundWave in Air. this the air is rare, b; still farther out, it is compressed, c;and it is again rare at d, etc. If pressure gauges were placed around in different partsof the room while the sound-wave was passing, some wouldshow high pressures while others showed low pressures.This…
Physics
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