18 pages matching plane wave in this book
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Attenuation of sound in narrow tubes vs frequency
ATTENUATION OF SOUND AND VIBRATIONS
23 other sections not shown
abscissa acoustic ohms acoustic power output acoustic power required acoustic reactance acoustic resistance acoustic watts air at 20 air gap flux air load aluminum discs ampere turns attenuation centimeters Chart Chart Chart circular piston mounted controlled mechanical system copper wire curve marked curves indicate cut-off frequency Decibel diameter in inches diameter over wavelength dynes per cm exponential horn F dynes family of curves Find the acoustic find the intersection force and frequency force of F FREQUENCY IN CYCLES function of frequency gauss hand ordinate scale Helmholtz resonator impedance infinite baffle magnet mechanical ohms multiply normal axis numbers particle displacement particle velocity peak amplitude phase angle piston diameter plane wave radiation resistance read the intersection resistance controlled mechanical resonance frequency ring diameter Sample Problem Find second harmonic slit small compared sound being radiated sound pressure spring tube vibrating piston vibrating system voice coil mass wave in air wavelength of sound