FOOTNOTES:[1]A certain allowance must be made for popular forms of speech in dealing with the subject of chest resonance. It is plain that the air in the chest cavity could not possibly be thrown into regular vibrations. In the acoustic sense the chest is not a hollow space, but a solid body. Filled as it is with the spongy tissue of the lungs, as well as the heart and the great blood vessels, there is no room for the formation of air waves or the oscillation of air particles. Another form of resonance is involved here, what is known in acoustics as sounding-board resonance. The reinforcing vibrations of the chest are those of its bony structure, which vibrates according to the same principle as the sounding-board of a piano.[2]Overtones, or harmonics, are the tones produced by the vibrations of the individual parts of a resonating body, into which it automatically divides itself. See Vol. XII.[3]Overtones.Cf.note above.
FOOTNOTES:[1]A certain allowance must be made for popular forms of speech in dealing with the subject of chest resonance. It is plain that the air in the chest cavity could not possibly be thrown into regular vibrations. In the acoustic sense the chest is not a hollow space, but a solid body. Filled as it is with the spongy tissue of the lungs, as well as the heart and the great blood vessels, there is no room for the formation of air waves or the oscillation of air particles. Another form of resonance is involved here, what is known in acoustics as sounding-board resonance. The reinforcing vibrations of the chest are those of its bony structure, which vibrates according to the same principle as the sounding-board of a piano.[2]Overtones, or harmonics, are the tones produced by the vibrations of the individual parts of a resonating body, into which it automatically divides itself. See Vol. XII.[3]Overtones.Cf.note above.
FOOTNOTES:
[1]A certain allowance must be made for popular forms of speech in dealing with the subject of chest resonance. It is plain that the air in the chest cavity could not possibly be thrown into regular vibrations. In the acoustic sense the chest is not a hollow space, but a solid body. Filled as it is with the spongy tissue of the lungs, as well as the heart and the great blood vessels, there is no room for the formation of air waves or the oscillation of air particles. Another form of resonance is involved here, what is known in acoustics as sounding-board resonance. The reinforcing vibrations of the chest are those of its bony structure, which vibrates according to the same principle as the sounding-board of a piano.
[1]A certain allowance must be made for popular forms of speech in dealing with the subject of chest resonance. It is plain that the air in the chest cavity could not possibly be thrown into regular vibrations. In the acoustic sense the chest is not a hollow space, but a solid body. Filled as it is with the spongy tissue of the lungs, as well as the heart and the great blood vessels, there is no room for the formation of air waves or the oscillation of air particles. Another form of resonance is involved here, what is known in acoustics as sounding-board resonance. The reinforcing vibrations of the chest are those of its bony structure, which vibrates according to the same principle as the sounding-board of a piano.
[2]Overtones, or harmonics, are the tones produced by the vibrations of the individual parts of a resonating body, into which it automatically divides itself. See Vol. XII.
[2]Overtones, or harmonics, are the tones produced by the vibrations of the individual parts of a resonating body, into which it automatically divides itself. See Vol. XII.
[3]Overtones.Cf.note above.
[3]Overtones.Cf.note above.