Central Hall, University of York

Information

Description: 
These Impulse Responses were recorded in the Central Hall venue of the University of York. The space is primarily used for lectures and conferences; to emulate this scenario; a sound source was placed centered on the stage of the venue while six different microphone positions were chosen to sample the acoustics of the space. As can be seen in the images, the microphone placements were chosen by dividing Central Hall into four audience areas: the stalls on the floor in the centre of the space (Stalls), the central block of seating (positions 3C, 3L), the block to the left of the stage (positions 3C, 3L), and a single position just above the entrance to the Hall and below stairs (diagonal block of seating (2L)). Position 2L was chosen at a non-chair position, because of potential interesting filtering effects of the stairs above the receiver as well as due to the lack of chairs below it. The rear of the stage had a projection screen lowered that was 1.4 m from the source, as would have been the case during the simulated scenario. The microphone in the central region (Stalls) was placed in front of the speaker, 5.1 m from the source. All microphone positions were 1.2 m above the floor at seat positions while the source was positioned at 1.5 m above stage level (both in compliance with ISO 3382-1:2009). The soundfield microphone orientation was always chosen to be orthogonal to the line of seats, facing the centre of the space.
Measurement Team: 
Alexander Vilkaitis
Ilias Antonopoulos
Joska De Langen
Xaun Liu
Capture Date: 
Sat, 07/02/2015
Size: 
8000 m³
Source Sound: 
Swept Sine, 20Hz - 20kHz; 15 Seconds
Source Sound Category: 
Swept sine (logarithmic)
Input: 
Genelec
Microphone(s): 
Soundfield
Space Category: 
Auditorium
Hall
Generation Type: 
Real World

Analysis

Analysis Description: 
This demonstration impulse response was captured in the centre of the centre block of seating, directly in front of the source.
Demonstration Impulse Response: 

Waveform

impulseClick here or on the waveform to upload a sound from your computer and hear it in this space

Acoustic Parameters


Octave Band
31.25 Hz62.5 Hz125 Hz250 Hz500 Hz1 kHz2 kHz4 kHz8 kHz16 kHz

Reverberation Time RT60 T30 (seconds)
2.671.581.421.071.111.121.030.860.631.95

Early Decay Time EDT (seconds)
1.541.541.671.411.281.411.411.161.030.64

Definition D50
0.110.320.300.440.330.190.200.240.440.72

Clarity C50 (dB)
-9.17-3.18-3.67-0.97-3.14-6.30-6.13-4.95-1.044.01

Clarity C80 (dB)
-5.680.69-1.770.35-1.15-2.39-2.88-2.371.277.54


Example Audio



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Impulse Responses

Format(s): 
B-Format (4 Channel Files)
B-Format: Multichannel: 

Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 16
Duration: 2.5 s
File Size: 1.83 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 16
Duration: 2.5 s
File Size: 1.83 MB
File Format: wav


Sample Rate: 44.1 kHz
Number of Channels: 2
Bits per Sample: 16
Duration: 2.5 s
File Size: 1.83 MB
File Format: mp1


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 16
Duration: 2.5 s
File Size: 1.83 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 16
Duration: 2.5 s
File Size: 1.83 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 16
Duration: 2.5 s
File Size: 1.83 MB
File Format: wav

Images

Photographs and Diagrams: 
Centre Stalls Receiver Position - 5.1m from Source
3C Receiver Position - Third row of central block of seating
3L Receiver Position - Centre of central block of seating
2L Receiver Position - Diagonal block of seating
General overview of Central Hall
Showing three blocks of seating. Block 3 (Far left), Block 2 (Diagonal in Foregr
Plan of Central Hall Including Source and Receiver Positions

Location

Address: 
Central Hall
University Road University Of York
York, NYK YO10 5DD
United Kingdom

Attribution

Attribute this work to: 
www.openairlib.net
Alexander Vilkaitis
Ilias Antonopoulos
Joska De Langen
Xuan Liu