ODEON and scattering.pdf

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Impulse responses Filtrerede impulsresponser. f c =12.5 kHz. Målt i position R4S1 med periodiske lægter. 0.1 0.08 0.06 0.04 0.02 Grå : På basis af 73 midlinger Sort: På basis af enkelt måling Pascal 0 -0.02 -0.04 -0.06 -0.08 -0.1 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 Tid [s]
Decay curves Energihenfaldskurver, for varierende antal midlinger N. Baseret på filtrerede impulsresponser, f c =12.5 kHz 0 og ved målinger på rekt. lægter. Målingerne er foretaget i pos. R4S1. -5 -10 -15 Energiniveau [dB] -20 -25 -30 -35 -40 -45 T 2 T 4 N=9 N=18 -50 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 N=36 N=73 Tid [s] N=1 N=2 N=4
Page 1 and 2: ODEON Workshop, Mariehamn, Åland,
Page 3 and 4: Reflection models (asymptotic model
Page 5 and 6: Sound scattering coefficient, s •
Page 7 and 8: Types of diffusers • Geometric di
Page 9 and 10: Irregular geometric structure
Page 11 and 12: Alternating absorbing and reflectin
Page 13 and 14: Measurement of the scattering coeff
Page 15 and 16: Set-up in a scale model for measure
Page 17: Principle: Three impulse responses
Page 21 and 22: Test samples
Page 23 and 24: Absorption of test specimen • Mea
Page 25 and 26: Rotation of test specimen • Conti
Page 27 and 28: Measurement results 1.2 1.1 1 0.9 0
Page 29 and 30: α s measured for 72 different star
Page 31 and 32: Summary of the ISO-method • The m
Page 33 and 34: Keränen et al. (2003)
Page 35 and 36: Keränen et al. (2003) Scattering C
Page 37 and 38: Keränen et al. (2003) Accuracy of
Page 39 and 40: Example: Sound scattering walls J.Y
Page 42 and 43: Jeon et al. (2003)
Page 44 and 45: Jeon et al. (2003) Max. height: 20

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