Notes

Outline

AUDITORIUM ACOUSTICS 2000 Imperial College (London), 19-21 July 2002

Teatro degli Arcimboldi: shape and dimensions

Comparison between Teatro La Scala and Teatro degli Arcimboldi

Measurements

Scale Model of Teatro degli Arcimboldi

Scale Model measurements

Equipment employed – sound sources

Equipment employed – sound sources

Directivity of the second sound source

Equipment employed binaural measurement system

Typical impulse responses in the scale model

Measurements in the real room

Measurements in the real room

Sound Source

Sound Power Spectrum

Microphones

Measurement of the directivity of the Soundfield ST-250 microphone

Polar plots of the ST-250 directivity

Measured acoustical parameters (averages)

Other acoustical parameters

Research of possible echoes

Comparison between measurements performed with and without lateral reflective panels

Comparison between measurements with and without audience

Comparison between scale model and real room

Comparison between scale model and real room

Comparison between scale model and real room

Conclusions The scale model was used mainly for studying the early reflections and for orienting properly the lateral reflectors Reverberation time and clarity measured in the model were coincident with the real room only in two octave bands (500 and 1000 Hz) The measurements performed in the real hall resulted in acoustical parameters strictly close to the design goal The presence of the reflecting panels revealed to be strongly beneficial for the sound field in the stalls, even if they were not optimally oriented The effect of seat occupance revealed to be very little, confirming that the chosen seats give an absorption almost independent of the presence of the listener

Slide 28