here - Level Acoustics

Workshop Listening Test: Results
Muziekcentrum Eindhoven
Row 4, seat 14
90
EK
90
13 April 2010
Schnittke - Vioolconcert nr 4
Master Class Room Acoustics for the Performing Arts
12-14 april 2010 – Eckhard Kahle
Acoustics Engineering
Introduction
On 12, 13 and 14 april 2010 the master class Room Acoustics for the
Performing Arts with Eckhard Kahle took place in the Laboratorium
voor Akoestiek in Eindhoven. During the master class a workshop took
place on the use of questionnaires to measure subjective acoustical
parameters in a concert hall. The technique of performing
questionnaires was first elucidated in various lectures and the
background of the existing questionnaire developed at Ircam was
treated.
After that a workshop took place in the laboratory where participants
listened to binaural recordings of pieces of music played back on a
Yamaha Disklavier in the chamber music hall of Muziekcentrum
Eindhoven. While listening to the samples through headphones “seats
were changed” and different acoustical aspects were discussed.
The final part of the workshop consisted of a visit to a concert in the
large concert hall of Muziekcentrum Eindhoven. During the concert
participants filled out the Ircam questionnaire at two different
positions in the hall. The next day, results of the questionnaires were
discussed within the group. In the next pages the concert hall is
described and the results of the workshop are presented.
Acoustics Engineering
Introduction
Orchestra:
Symphony Orchestra of New Russia
Yuri Bashmet, conductor
Gidon Kremer, violin
Works:
Schnittke - Vioolconcert nr 4
Tsjaikovski - Symfonie nr 6 ‘Pathétique’
Date and Time:
di 13 apr 2010 - 20:15 uur
Concert hall:
Muziekcentrum Frits Philips Eindhoven
Eindhoven Airport Zaal
Seats: 1250
Volume: 14.400 m³
Volume/seat: 11,5 m³/seat
Stage area: 190 m²
Architect: Van Aken Architecten (NL)
Acoustics: Prof. P.A. de Lange
and Ir. L.C.J. van Luxemburg
Front stalls
lc
a
B
Muziekcentrum Frits Philips Eindhoven - Concert Hall
Acoustics Engineering
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n
o
Reverberation Time (s)
Hall Parameters
Empty
Occupied
Front stalls
Frequency (Hz)
Front stalls
Balcony
RT
1.9
2,1
s
EDT
2.0
2.0
s
C80
0.0
-0.5
dB
G
5.7
2.7
dB
LEF
0.12
0.20
-
lc
a
B
Acoustics Engineering
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n
o
Ircam Questionnaire
Part 1: Perception of the Hall
Part 2: Perception of the Sound Sources (+optional questions)
Part 3: Spectral Balance
Part 4: General Impressions
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Ircam Questionnaire
Perception of the Hall 1
7
Schnittke
Tsjaikovski
6
Very Strong
Very Big
Very Strong
Very weak
Very Small
Very weak
Subjective dynamics
Reverberance
Front stalls
Balcony
5
4
average
3
2
1
0
Subjective Loudness
1-6 scale
1-6 scale
1-6 scale
Acoustics Engineering
Ircam Questionnaire
Perception of the Hall 2
5
Schnittke
Tsjaikovski
Front stalls
4
Big
Strong
Small
Weak
Balcony
3
average
2
1
0
Subj. Hall Size
1-4 scale
Subj. Envelopment
1-4 scale
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Ircam Questionnaire
Coloration 1
4
Schnittke
Tsjaikovski
Front stalls
3
2
1
Warm
Lively
Brilliant
lack of intimacy
lack of warmth
dry
lack of brill.
Intimacy
Warmth
Livelyness
Brilliance
1-3 scale
1-3 scale
1-3 scale
1-3 scale
Intimate
Balcony
average
0
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Ircam Questionnaire
Coloration 2
1,0
Schnittke
Tsjaikovski
Front stalls
Balcony
YES
0,5
NO
0,0
Muddy
Heavy
Acid
Aggressive
Hard
Acoustics Engineering
Ircam Questionnaire
Perception of sound sources
7
Schnittke
6
Very close
Tsjaikovski
Front stalls
very clear
masking of
the soloist
5
edgy
4
average
fluid
average
average
3
average
precise
average
strong
2
average
1
Very far
masking of the
orchestra
very muddy
flat
stumbling
Presence
Clarity
Detail Att. 1
Detail Att. 2
Balance
1-2 scale
1-6 scale
1-4 scale
1-4 scale
1-5 scale
diffuse
weak
Sub. Distance
Localization
1-6 scale
1-2 scale
0
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Balcony
Ircam Questionnaire
Spectral Balance
4
Schnittke
Tsjaikovski
Front stalls
3
2
1
Balcony
strong
average
weak
0
Reverb Bass Freq
Reverb High Freq
Loudness Bass Freq
Loudness High Freq
1-3 scale
1-3 scale
1-3 scale
1-3 scale
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Ircam Questionnaire
General Impressions
6
Schnittke
5
Tsjaikovski
Front stalls
Very Good
Balcony
4
3
fair
2
1
Very Bad
0
General impression
Overall Balance
Adaptation of hall to
music
Musical interpretation
Appreciation of music
1-5 scale
1-5 scale
1-5 scale
1-5 scale
1-5 scale
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Discussion
During the discussions is was shown that most participants found it hard to judge the
acoustical aspects in the questionnaire. Among other things, the type and
appreciation of the music seemed to be an important factor. Relation between the
results of different parameters were also discussed and explained.
It was made clear that for a more accurate and reliable measurement a larger group
is needed that fill in the questionnaires. Also, to be able to compare different halls, it
is important to have the same listening group and to calibrate the results of this
group. Participants of the master class were encouraged to fill in the questionnaire
during the upcoming concert visits. It proved to be a valuable tool for judging
subjective room acoustical parameters.
Acoustics Engineering