Acoustic Design Charts |
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Page xi
... diameter over wavelength 137 139 • 66. Polar distribution of sound from a vibrating thin ring vs. ring diameter over wavelength 67. Degrees off the normal axis of a vibrating piston for the sound to be attenuated 20 db . , 10 db . , 6 ...
... diameter over wavelength 137 139 • 66. Polar distribution of sound from a vibrating thin ring vs. ring diameter over wavelength 67. Degrees off the normal axis of a vibrating piston for the sound to be attenuated 20 db . , 10 db . , 6 ...
Page 135
... diameter over wavelength . CHART 66. Polar distribution of sound from a vibrating thin ring vs. ring diameter over wavelength . CHART 67. Degrees off the normal axis of a vibrating piston for the sound to be attenuated 20 db . , 10 db ...
... diameter over wavelength . CHART 66. Polar distribution of sound from a vibrating thin ring vs. ring diameter over wavelength . CHART 67. Degrees off the normal axis of a vibrating piston for the sound to be attenuated 20 db . , 10 db ...
Page 144
... ring diameter over wavelength of sound being radiated . As the diameter increases , the acoustic power radiated is kept constant ( in other words , the increase in pressure on the normal axis is due solely to the sharpening up of the ...
... ring diameter over wavelength of sound being radiated . As the diameter increases , the acoustic power radiated is kept constant ( in other words , the increase in pressure on the normal axis is due solely to the sharpening up of the ...
Contents
PREFACE | 1 |
ATTENUATION OF SOUND AND VIBRATIONS | 21 |
SECTION 3 | 39 |
Copyright | |
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Common terms and phrases
abscissa acoustic ohms acoustic power output acoustic reactance acoustic resistance acoustic watts air at 20 air gap flux air load aluminum discs ampere turns attenuation centimeters circular piston mounted controlled mechanical system copper wire curve marked curves indicate cut-off frequency CYCLES CHART DECIBELS diameter in inches diameter over wavelength dynes dynes per sq enclosed volumes equal exponential horn family of curves field power Find the acoustic find the intersection FREQUENCY IN CYCLES gauss hand ordinate scale Helmholtz resonator impedance infinite baffle KILOGAUSS Magnetizing force mass controlled mechanical ohms multiply normal axis numbers orifice particle displacement particle velocity peak amplitude piston diameter plane wave radiation resistance read the intersection resonance frequency ring diameter Sample Problem Find second harmonic slit small compared Solution sound being radiated sound pressure spring stiffness throat area Transmission loss tube various frequencies various ratios vibrating piston vibrating system voice coil mass wavelength of sound