Index
A
absolute category-rating (ACR) test 415
absorption: coefficients as function of frequency 316; decay time and 338–40; effect on early reflections 293–4; position, for reflection-free zones 398; for reflection-free zones 397; and reverberation time calculations for treated living room 321–2; and reverberation time calculations for untreated living room 318–19
absorption materials 345–51; Helmholtz 349; porous 345–7; resonant 347–9; summary of 350–1; wideband 349–50, 351
a cappella (unaccompanied) singing, tuning in 231–4
acoustic cues, timbre perception and 251–9
acoustic impedance 20
acoustic instrument, components of 172
acoustic models see musical instruments
acoustic reflex 77
acoustics of enclosed spaces see enclosed spaces, ...
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