Musical AcousticsDesigned for an introductory, nontechnical college course, this book requires no background in either science or music. Hall's text helps readers use simple physical and mathematical concepts as tools for understanding how music works and, at the same time, to use their interests in music to motivate the study, appreciation, and understanding of the underlying principles of physics. Hall effectively draws on his training as a scientist and a professional musician to help students develop an appreciation for physical processes without neglecting the psychological and esthetic aspects of musical acoustics. |
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Page 74
... sound with another so that we will have no need to know b . We can instead use ratios ( I1 / I2 ) = ( A1 / A2 ) 2 . * For sine waves , / = A2 / 2pc , where A is the ... Sound Intensity and Its Measurement Sound Level and the Decibel Scale.
... sound with another so that we will have no need to know b . We can instead use ratios ( I1 / I2 ) = ( A1 / A2 ) 2 . * For sine waves , / = A2 / 2pc , where A is the ... Sound Intensity and Its Measurement Sound Level and the Decibel Scale.
Page 78
... sound is 10-3 W / m2 . For comparison , the intensity of direct sunlight on a clear day is roughly 10 + 3 W / m2 ... level meter really measures is not the sound intensity level SIL , but the sound pressure level , SPL = 20 log ( p / Po ) ...
... sound is 10-3 W / m2 . For comparison , the intensity of direct sunlight on a clear day is roughly 10 + 3 W / m2 ... level meter really measures is not the sound intensity level SIL , but the sound pressure level , SPL = 20 log ( p / Po ) ...
Page 87
... sound intensity of 103 W / m2 ( that is , one carrying as much energy as bright sunlight ) , what sound level SIL ( in dB ) must you have ? 6. What is the intensity I if the sound level is SIL 40 dB ? For 85 dB ? = 7. What is the sound ...
... sound intensity of 103 W / m2 ( that is , one carrying as much energy as bright sunlight ) , what sound level SIL ( in dB ) must you have ? 6. What is the intensity I if the sound level is SIL 40 dB ? For 85 dB ? = 7. What is the sound ...
Contents
THE NATURE OF SOUND | 1 |
WAVES AND VIBRATIONS | 17 |
SOURCES OF SOUND | 38 |
Copyright | |
23 other sections not shown
Common terms and phrases
acoustical amplifier amplitude approximately basilar membrane bass beats Chapter chord chromatic chromatic scale circle of fifths clarinet components consonant corresponding critical band curve diaphragm diatonic scale difference tone direct dissonant effect electrical electronic energy equal temperament example f₁ fifth flute force formants Fourier frequency ratio harmonic series hear higher hole implied fundamental important instruments intensity intervals JASA length listener loudness loudspeaker magnetic major thirds means meantone measure meter microphone minor mistuning motion move musical acoustics natural modes notes octave oscillation pattern perception perfect fifth piano pipe pitch play pressure produce Pythagorean tuning quency range reed resonance reverberation Section semitone signal sine waves sones sound level sound wave speaker spectra spectrum steady string syntonic comma theory timbre tion tonic transducers triad tube tuning vibration violin vocal cords vocal tract voltage vowel W/m² waveform wavelength