SUBJECTIVE ATTRIBUTES OF SOUND Acoustics of Concert Halls and Rooms Science of Sound, Chapters 5,6,7 Loudness, Timbre
FOUR ATTRIBUTES USED TO DESCRIBE A SOUND: Loudness Pitch Timbre Duration EACH OF THESE DEPENDS ON ONE OR MORE PHYSICAL PARAMETERS THAT CAN BE MEASURED: Sound pressure Frequency Spectrum Duration (measured) Envelope Relating the SUBJECTIVE QUALITIES to the PHYSICAL PARAMETERS that we can MEASURE OBJECTIVELY Is an important problem in PSYCHOACOUSTICS
DEPENDENCE OF SUBJECTIVE QUALITIES OF SOUND ON PHYSICAL PARAMETERS
LOUDNESS LEVEL Contours of equal loudness are labeled phons At 1000 Hz, Loudness Level = L p
SOUND LEVEL METER
PLOT YOUR OWN FREQUENCY RESPONSE ASSIGNMENT: Plot your own frequency response curves by using
HOW DOES LOUDNESS DEPEND ON FREQUENCY?
LOUDNESS SCALING
LOUDNESS OF COMPLEX TONES: CRITICAL BANDS Loudness depends mainly on SOUND PRESSURE. but it also depends on FREQUENCY, SPECTRUM and DURATION
DEPENDENCE OF LOUDNESS ON BANDWIDTH
LOUDNESS OF COMBINED SOUNDS
RANGE OF FREQUENCY AND INTENSITY OF THE EAR
MUSICAL DYNAMICS AND LOUDNESS
HOW DOES LOUDNESS DEPEND ON PARTIAL MASKING?
HOW DOES LOUDNESS DEPEND ON DURATION?
EFFECT OF TONE ENVELOPE ON TIMBRE
EFFECT OF ENVELOPE ON TIMBRE PIANO NOTES PLAYED FORWARD AND BACKWARD