Dr. Yoichi Ando (auth.)'s Concert Hall Acoustics PDF

By Dr. Yoichi Ando (auth.)

ISBN-10: 3642698107

ISBN-13: 9783642698101

ISBN-10: 3642698123

ISBN-13: 9783642698125

The acoustic caliber of a live performance corridor has often posed a mysterious puzzle, particularly, what actual features of the sound box can produce better sound for the listener. the writer has been probing for greater than adecade into the subjective features hottest for musical and speech sounds. the results of his huge investigations - the invention that 4 and simply 4 self sufficient parameters give a contribution successfully to solid acoustics - is summarized within the current e-book. the potential of calculating acoustical caliber at any seat in a proposed live performance corridor is a distinct and really valuable element of Ando's layout strategy. replacement architectural schemes might be in comparison in accordance with the variety of seats which exceeds a formerly accredited minimal average of acoustical quality.

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Sample text

36' 54' Ir- 72' 'v-' I- 106' 144' r II o· lr' \J 1B' --- ",'---' h\J r\r-,. \ 11"'\ ~\ If'. V h\ r.... V -1 ~ 90' lOB' 12B' 144' r. 5 1 2 Frequency - 5 10 15 [kHz] Fig. 13a, b. 18]. (a) Amplitudes; (b) phases 26 2. __, Amplitude ~ 10 ~--~-+---/~fi ] .... "3 i: ----':-_____=_:' 10 15 (kHz] Fig. 14 ~ _ Fig. 14. 2. 5 --L_ _--'--_---'----' 1 2 Frequency - 5 [kHz) 10 15 Fig. 15. 0 kHz), the transfer function of the external canal E(w) is independent of the directions in which sound is incident on the human head for the audiofrequency range.

90- 162' 160' '-... V- ",'--- ",vll L-- t\-v h V 11 \J V ~ 126' 162' r--... 36' 54' Ir- 72' 'v-' I- 106' 144' r II o· lr' \J 1B' --- ",'---' h\J r\r-,. \ 11"'\ ~\ If'. V h\ r.... V -1 ~ 90' lOB' 12B' 144' r. 5 1 2 Frequency - 5 10 15 [kHz] Fig. 13a, b. 18]. (a) Amplitudes; (b) phases 26 2. __, Amplitude ~ 10 ~--~-+---/~fi ] .... "3 i: ----':-_____=_:' 10 15 (kHz] Fig. 14 ~ _ Fig. 14. 2. 5 --L_ _--'--_---'----' 1 2 Frequency - 5 [kHz) 10 15 Fig. 15. 0 kHz), the transfer function of the external canal E(w) is independent of the directions in which sound is incident on the human head for the audiofrequency range.

3 Preferred Amplitude of a Single Reflection Using music motif B, sound fields with a single reflection from the direction of ~1 = 40° and 111 = 19° were examined. These values are in the range ± (55° ± 20°). The angle measured from the median plane is a"'" 37° [a = sin -1 (sin ~ cos 11)]. The delay and amplitude of the single reflection were chosen L1 t1 = 10,20, ... 5 dB, respectively. First of all, to obtain the preferred delays at each fixed amplitude of reflection, paired comparison tests were performed by varying the delay for each fixed A 1• Results are shown in Fig.

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Concert Hall Acoustics by Dr. Yoichi Ando (auth.)


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