The Lady Chapel, St Albans Cathedral

Information

Description: 
This data consists of 2 sets of impulse responses measured in the Lady Chapel at St Albans Cathedral. Measurements were taken at two different source and receiver positions, A and B. The positions of the sources and receivers for the two configurations, A and B, can be are described in the attached diagram. Each set consists of a 4 channel B-format response, a 2-channel ORTF stereo response, a 2-channel binaural stereo response and a 5-channel discrete microphone response (5.0) based on the Williams MMA microphone technique. Construction of the cathedral was started by the Normans in 1077 and hundreds of years of construction have resulted in a mixture of different architectural styles. The Lady Chapel is an example of architecture from the Decorated Gothic Period and was completed in 1327.
Measurement Team: 
Marcin Gorzel
Gavin Kearney
Aglaia Foteinou
Sorrel Hoare
Simon Shelley
Capture Date: 
Thu, 19/08/2010
Source Sound: 
Log swept sine; 20 Hz - 22 kHz; 10 Seconds; 44100 Hz
Source Sound Category: 
Swept sine (logarithmic)
Input: 
Genelec S30D digital monitoring system
Microphone(s): 
Neumann KM 140 cardioid microphone
Soundfield SPS422B microphone system
Space Category: 
Cathedral
Generation Type: 
Real World

Analysis

Analysis Description: 
The impulse response used for analysis is the W-channel from the B-format recording made at source-receiver position A.
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)
3.443.283.312.782.492.342.101.711.050.62

Early Decay Time EDT (seconds)
2.142.522.401.761.501.501.240.600.350.22

Definition D50
0.130.340.190.560.570.630.670.850.910.96

Clarity C50 (dB)
-8.39-2.96-6.220.991.302.352.987.6610.0814.40

Clarity C80 (dB)
-5.66-2.13-0.652.742.743.794.449.2212.2017.47


Example Audio



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Impulse Responses

Format(s): 
Mono
Stereo (Stereo Files)
5.1 Surround (6 Channel Files)
B-Format (4 Channel Files)
Mono: 

Sample Rate: 44.1 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 6 s
File Size: 775.3 KB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Neumann KM 140 Cardioid
Source Location: A
Microphone Location: A
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 6 s
File Size: 775.3 KB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Neumann KM 140 Cardioid
Source Location: B
Microphone Location: B
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 6 s
File Size: 775.3 KB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Soundfield SPS422B Microphone
Source Location: A
Microphone Location: A
Source Height: 1.5 m
Receiver Height: 1.5 m

Stereo: 

Sample Rate: 44.1 kHz
Number of Channels: 2
Bits per Sample: 24
Duration: 6 s
File Size: 1.51 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Neumann KM 140 Cardioid
Source Location: A
Microphone Location: A
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 2
Bits per Sample: 24
Duration: 6 s
File Size: 1.51 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Neumann KM 140 Cardioid
Source Location: B
Microphone Location: B
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 2
Bits per Sample: 24
Duration: 6 s
File Size: 1.51 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Source Location: A
Microphone Location: A
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 2
Bits per Sample: 24
Duration: 6 s
File Size: 1.51 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Source Location: B
Microphone Location: B
Source Height: 1.5 m
Receiver Height: 1.5 m

B-Format: Multichannel: 

Sample Rate: 44.1 kHz
Number of Channels: 4
Bits per Sample: 24
Duration: 6 s
File Size: 3.03 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Soundfield SPS422B Microphone
Source Location: A
Microphone Location: A
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 4
Bits per Sample: 24
Duration: 6 s
File Size: 3.03 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Soundfield SPS422B Microphone
Source Location: B
Microphone Location: B
Source Height: 1.5 m
Receiver Height: 1.5 m

5.1 Surround: 

Sample Rate: 44.1 kHz
Number of Channels: 6
Bits per Sample: 24
Duration: 6 s
File Size: 4.54 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Soundfield SPS422B Microphone
Source Location: A
Microphone Location: A
Source Height: 1.5 m
Receiver Height: 1.5 m


Sample Rate: 44.1 kHz
Number of Channels: 6
Bits per Sample: 24
Duration: 6 s
File Size: 4.54 MB
File Format: wav
Source Sound: Genelec S30D, 10 second log. sine sweep
Microphone: Soundfield SPS422B Microphone
Source Location: B
Microphone Location: B
Source Height: 1.5 m
Receiver Height: 1.5 m

Images

Photographs and Diagrams: 
Photograph showing the Lady Chapel
Diagram of the Lady Chapel
Photograph showing the Lady Chapel
Diagram showing the source and receiver positions for this data

Location

Address: 
St Albans Cathedral
Sumpter Yard, Holywell Hill
St. Albans, HRT AL1 1BY
United Kingdom
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Attribution

Attribute this work to: 
www.openairlib.net
Audiolab, University of York
Marcin Gorzel
Gavin Kearney
Aglaia Foteinou
Sorrel Hoare
Simon Shelley