Real World

St John's Church - Wolverhampton

Information
Measurement Team: 
Dr Aglaia Foteinou
Eleni Tavelidou
Josh Pritchett
Capture Date: 
Tue, 17/01/2017
Source Sound: 
Logarithmic Sine Sweep; 22Hz-22kHz; 15sec
Source Sound Category: 
Swept sine (logarithmic)
Input: 
PMC TB2
Microphone(s): 
Behringer ECM8000
Space Category: 
Church
Generation Type: 
Real World
Analysis
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)
14.745.871.151.491.962.031.931.481.019.16

Early Decay Time EDT (seconds)
2.131.371.371.751.621.371.370.980.600.34

Definition D50
0.210.330.160.250.380.520.530.550.790.91

Clarity C50 (dB)
-5.81-3.12-7.28-4.72-2.170.410.510.945.8810.27

Clarity C80 (dB)
-4.220.97-1.32-0.760.643.363.645.669.0814.03


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Images
Photographs and Diagrams: 
Location
Address: 
Wolverhampton
St John's Square
Wolverhampton WV2 4BZ
United Kingdom
Attribution
Attribute this work to: 
www.openairlib.net
Dr Aglaia Foteinou
Eleni Tavelidou
Josh Pritchett
University of Wolverhampton

St Matthew's Church - Walsall

Information
Measurement Team: 
Dr Aglaia Foteinou
Eleni Tavelidou
Capture Date: 
Fri, 05/12/2014
Source Sound: 
Logarithmic Sine Sweep; 22Hz-22kHz; 15sec
Source Sound Category: 
Swept sine (logarithmic)
Input: 
PMC TB2
Microphone(s): 
Behringer ECM8000
Space Category: 
Church
Generation Type: 
Real World
Analysis
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)
5.191.151.301.591.821.861.711.401.000.75

Early Decay Time EDT (seconds)
1.191.190.941.581.581.191.321.190.810.55

Definition D50
0.090.280.210.300.430.650.450.510.660.86

Clarity C50 (dB)
-10.19-4.01-5.85-3.65-1.232.75-0.840.192.887.81

Clarity C80 (dB)
-3.631.352.57-0.841.033.951.032.675.9511.14


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Images
Photographs and Diagrams: 
Location
Address: 
Walsall
St Matthew's Cl
WS1 3DG
United Kingdom
Attribution
Attribute this work to: 
www.openairlib.net
Dr Aglaia Foteinou
Eleni Tavelidou
University of Wolverhampton

Hoffmann Lime Kiln (Langcliffe,UK)

Information
Description: 
The Hoffmann Lime Kiln, situated in Langcliffe, UK within the Yorkshire Dales National Park is the most structurally complete of the remaining (Hoffmann) lime kilns in the UK. Built in 1873, the industrial scale lime kiln was commissioned by the Craven Lime Company and stood operational until 1931. For more historical and architectural information on the kiln visit the Craven Museum website: (https://www.cravenmuseum.org/archaeology/fact-sheets/the-hoffmann-kiln/). It’s large stone construction, semi-cylindrical shape and many open entrances provide an interesting basis for impulse response measurement. This page presents six Impulse Responses, taken from various positions within the kiln, each coming with their own spatial description and five auralised examples. All measurements were taken in accordance with the ISO-3382 regulations.
Measurement Team: 
Hashim Riaz
Jack Smith
Juan Garcia
Pau Rosell
Capture Date: 
Tue, 28/02/2017
Source Sound: 
Log. Swept Sine; 20-20k Hz; 20s long
Source Sound Category: 
Swept sine (logarithmic)
Input: 
Genelec 8130A
Microphone(s): 
Soundfield ST450 MKII Microphone
Space Category: 
Chamber
Generation Type: 
Real World
Analysis
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)
2.832.071.501.120.930.710.530.380.330.26

Early Decay Time EDT (seconds)
0.920.790.660.660.660.660.400.400.400.40

Definition D50
0.570.360.550.590.630.670.880.900.890.92

Clarity C50 (dB)
1.23-2.560.861.652.273.158.699.319.0710.50

Clarity C80 (dB)
4.926.356.907.015.577.4312.7114.6514.9118.32


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Location
Address: 
Hoffmann Lime Kiln Langcliffe
Yorkshire Dales National Park
Langcliffe, NYK BD24 9NU
United Kingdom
Attribution
Attribute this work to: 
www.openairlib.net
Audiolab, University of York
Jack Smith, Juan García, Hashim Riaz, Pau Rosell

York Guildhall Council Chamber

Information
Description: 
Situated behind the Mansion House, the Guildhall was constructed in the 15th century as a meeting place for the guilds of York. The council chamber in its current form was built much later, completed in 1891. It is constructed predominantly of wood, including wooden panelling that borders all four walls from the floor to approximately 2.5 in height. Victorian wallpapered plaster walls forms 3 meters of walling above the wooden panelling. The ceiling is arched perpendicular to the length of the room and is constructed of timber, in a combination of beams and panelling. The room measures 15.23m in length, 10.04m in width, and 8.68m in height (at arch apex). Leather lined wooden seating forms a large proportion of the room, with a large heavy oak table located at the room's centre. Three source positions were selected based on the positions from which the city mayor and primary members of the council would typically address the public or other council members. Similarly, four receiver positions were chosen based on the positions the public and other council members would listen from. Source position 1 was from the mayor's chair. Sources 2 and 3 on either side of the council pews where primary members of the council would usually address from. Receiver 1 was located at the centre point of the public pews to assess speech intelligibility for a typical listener. Receivers 2, 3 and 4 were spread across the council seating that faces directly opposite but furthest from the mayor. The reasons for this were twofold. Firstly to give a general acoustic impression for a listener located in the main body of the room. Secondly to assess the difference, if any, in intelligibility between a council listener and those located in the public pews (Please see images for more precise source/receiver positions). The composition and materials used in an original victorian council chamber are in themselves quite unusual, and a room with these types of dense wooden structures has seen less in the way of acoustic response measurements. We aimed to explore how these uncommon structures, as well as the variety of other materials used (leather, stain glass, large curtains and wallpaper), influenced the acoustical characteristics of the space.
Measurement Team: 
Oliver McIntyre
Benjamin Tsui
Elizabeth Wilson
Capture Date: 
Fri, 17/02/2017
Size: 
1140 m³
Source Sound: 
Swept Sine; 20 Hz - 22 kHz; 30 Seconds, 96kHz
Source Sound Category: 
Swept sine (logarithmic)
Input: 
Genelec 8130A
Microphone(s): 
Soundfield ST450 MkII
Space Category: 
Chamber
Generation Type: 
Real World
Analysis
Analysis Description: 
Source Position 1 - Mayor's Chair, Receiver Position 1 - Public Pews Central. Distance between source and receiver: 12 m. Receiver position: 1.75 m from NW wall, 13.75 m from SE wall. Temperature: 16°C. Humidity: 82%
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)
3.622.250.730.840.930.930.890.820.640.46

Early Decay Time EDT (seconds)
1.391.270.880.751.010.881.010.880.750.50

Definition D50
0.020.290.620.550.600.530.440.520.600.80

Clarity C50 (dB)
-16.68-3.812.130.871.810.58-1.020.311.715.93

Clarity C80 (dB)
-6.85-1.726.926.794.713.382.944.245.9811.40


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Images
Photographs and Diagrams: 
Location
Address: 
Guildhall Council Chamber
St. Helen’s Square
York, NYK YO1 9QL
United Kingdom
Attribution
Attribute this work to: 
www.openairlib.net
Audiolab, University of York
Benjamin Tsui
Oliver McIntyre
Elizabeth Wilson
- - - - - - - - - - - - - - - - - - - -
Image 2 by Kaly99. Available: https://commons.wikimedia.org/wiki/File:Guildhall,_York.jpg
Image 8 Floor Plan, City of York Council. Available: https://www.york.gov.uk/downloads/file/11337/guildhall_drawings

Creswell Crags

Information
Description: 
A series of IRs recorded at Creswell Crags - including some recorded inside one of the caves using a sine sweep, and in the main gorge using a starter pistol. See link below for a full report on the recordings.
Measurement Team: 
Francis Stevens
Capture Date: 
Wed, 14/09/2016
Source Sound: 
Swept Sine: 22 Hz - 22 kHz 30s; Starter pistol
Source Sound Category: 
Swept sine (logarithmic)
Microphone(s): 
Soundfield STM 450 B-format microphone
Space Category: 
Open Air
Generation Type: 
Real World
Analysis
Analysis Description: 
One of the IRs recorded inside a cave
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)
1.351.191.120.880.730.560.460.390.310.23

Early Decay Time EDT (seconds)
1.021.021.020.640.510.380.380.250.250.12

Definition D50
0.530.530.640.690.850.890.920.950.970.99

Clarity C50 (dB)
0.450.522.443.487.659.0310.5112.7614.7621.36

Clarity C80 (dB)
5.584.134.308.729.7212.4814.9017.5120.5528.94


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Images
Photographs and Diagrams: 
The recording setup on the main level of Robin Hood cave
The microphone placed in the gorge on the path next to Robin Hood Cave
Location
Address: 
Creswell Crags
Crags Road Creswell
Worksop S80 3LH
United Kingdom
Attribution
Attribute this work to: 
www.openairlib.net

Live Room, Sound Studio Laboratory, University of Athens

Information
Description: 
The Sound Studio of the Laboratory of Music Acoustics Technology (LabMAT) at the Department of Music Studies of the University of Athens consists of three main spaces being the Mixing Suite, the Control Room, and the Live Room. It is equipped with the state-of-the-art technology for recordings and sound production, and it is used for teaching, professional recordings, and research activities. Rotating-wall acoustic panels are installed in the Live Room, as well as a set of sliding acoustic panels mounted on a rail system approximately in the middle area. The sliding panels can be used to divide the space into two rooms and modify the acoustics of the space according to the user’s needs. The measurements presented here are from the largest section of the divided space for three acoustic configurations of the panels. For more information please contact with Aglaia Foteinou (A.Foteinou@wlv.ac.uk) The acoustic study of this space was presented at the Acoustics2016 (04/10/16) and the paper can be found here: http://conferences.helina.gr/2016/en/program/
Measurement Team: 
Aglaia Foteinou
Eleni Tavelidou
Capture Date: 
Fri, 15/07/2016
Size: 
397 m³
Source Sound: 
Swept Sine; 22Hz - 22kHz ; 15 Seconds
Source Sound Category: 
Swept sine (logarithmic)
Input: 
Brüel & Kjær Type 4292-L (dodecahedral)
Microphone(s): 
Behringer ECM-8000 (omnidirectional)
Neumann KU-100 dummy head (binaural)
Audio Technica AT4050 (figure-of-eight)
Space Category: 
Recording Studio
Generation Type: 
Real World
Analysis
Analysis Description: 
The impulse response used for analysis is from the omnidirectional recording (Behringer ECM-8000) made at R8 at the most reverberant acoustic configuration (Conf B).
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)
4.030.710.460.600.590.530.530.480.420.37

Early Decay Time EDT (seconds)
0.820.430.560.560.560.560.430.430.310.31

Definition D50
0.430.770.740.790.810.810.840.810.910.93

Clarity C50 (dB)
-1.205.214.465.816.386.357.306.279.9911.04

Clarity C80 (dB)
2.6813.9010.6210.8010.6010.8011.4811.4214.9516.49


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Images
Photographs and Diagrams: 
Location
Address: 
Department of Music Studies, Faculty of Philosophy, University of Athens,
Panepistimiopolis Ilissia
Athens 15784
Greece
Attribution
Attribute this work to: 
www.openairlib.net
Aglaia Foteinou
Eleni Tavelidou
University of Wolverhampton
University of Athens

Dromagorteen stone circle, Co. Kerry, Ireland

Information
Description: 
Dromagorteen stone circle (Early/Middle Bronze Age: 2000 to 1150 BCE) has 13 stones, one is a recumbent stone and two are portal stones. It belongs to the group Axial Stone Circles (ASC) in Co. Kerry and Co. Cork in Ireland. There is some periodic sound (-56 dB and every 0.37sec), don't know what it is...
Measurement Team: 
Victor Reijs
Capture Date: 
Sat, 14/11/2015
Source Sound: 
small balloon
Source Sound Category: 
Balloon Pop
Microphone(s): 
Zoom H1 build in X/Y unidirection microphones
Space Category: 
Arena
Open Air
Generation Type: 
Real World
Analysis
Analysis Description: 
Microphone on recumbent stone and balloon pop between the portal stones
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)
0.0028.3817.836.071.341.367.390.947.7916.30

Early Decay Time EDT (seconds)
20.410.180.180.180.060.060.060.060.060.18

Definition D50
0.430.971.001.001.001.001.001.000.990.99

Clarity C50 (dB)
-1.2915.5424.9726.5428.8228.0424.3025.0921.6321.62

Clarity C80 (dB)
-0.9915.8426.5729.3931.2028.6025.3726.2924.4023.89


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Images
Photographs and Diagrams: 
View from recumbent stone, over internal dolmen, towards portal
The recumbent stone (stone 1)
Dromagorteen stone circle
The right side of the binaural mic setup
The binaural home made mic set (with windmufflers)
Location
Address: 
Dromagorteen Bonane, KR
Ireland
Attribution
Attribute this work to: 
www.openairlib.net
www.archaeocosmology.org/eng/woodcircleaoucistictestplan.htm
https://www.academia.edu/33589224/Acoustic_and_aural_research_at_timber_and_stone_circles

Grange stone circle (B), Co. Limerick, Ireland

Information
Description: 
The Grange stone circle (B) at Lough Gur (from around 2900 BCE) has an internal diameter of ~45.5m and its standing stones are on average slightly higher than 1.5m (some are though higher). There is an earthen bank (~9m wide and ~1m high) along the standing stones (on outside). Most IRs have the dawn chorus on it and a high pass filter at 150 Hz has been used to remove wind noise...
Measurement Team: 
Victor Reijs
Capture Date: 
Tue, 26/04/2016
Source Sound: 
Paper banger
Source Sound Category: 
Other
Microphone(s): 
Zoom H1 build in X/Y unidirection microphones
Space Category: 
Arena
Open Air
Generation Type: 
Real World
Analysis
Analysis Description: 
This impulse response was recorded when mic stood 10m from Rannach Crom Dubh, while paper banger was in the centre and mic directed to the centre).
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)
5.275.184.694.151.210.850.913.753.133.28

Early Decay Time EDT (seconds)
2.372.370.580.580.580.450.450.580.450.20

Definition D50
0.600.630.490.530.340.300.340.670.900.96

Clarity C50 (dB)
1.672.23-0.150.53-2.88-3.65-2.963.179.5013.81

Clarity C80 (dB)
3.663.000.713.8710.5417.2914.718.7513.4618.00


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Images
Photographs and Diagrams: 
Rannach Crom Dubh, which is a good reflector
Part of the circle
Part of circle with passage and Rannach Crom Dubh
The slight tilt of Rannach Crom Dubh
The standing stone flanking the passage
Location
Address: 
Grange stonce circle (B) Lough Gur, LM
Ireland
Attribution
Attribute this work to: 
www.openairlib.net
www.archaeocosmology.org/eng/woodcircleaoucistictestplan.htm
https://www.academia.edu/33589224/Acoustic_and_aural_research_at_timber_and_stone_circles

Neolithic timber circle Goseck, Germany

Information
Description: 
Reconstructed Goseck timber circle (from around 4800 BCE) has two tightly (~4cm) spaced 1st and 2nd palisade rings (~50m and ~60m diameter). The posts have a diameter of 20cm and a height of 2.5 to 3m. The posts are quite straight and have no bark. The balloon pops (the balloon size along the surface from tip to mouth piece was 45cm) and paper bangers (http://www.instructables.com/id/Super-banger/) were used to generate an IR.
Measurement Team: 
Reinhard Mussik
Victor Reijs
Elke Hockauf
Finn Hockauf
Capture Date: 
Sat, 09/04/2016
Source Sound: 
Balloon Pop and paper banger
Source Sound Category: 
Balloon Pop
Microphone(s): 
microphone of Samsung Galaxy S5
binaural microphones near ears
Space Category: 
Arena
Open Air
Generation Type: 
Real World
Analysis
Analysis Description: 
This impulse response was recorded when standing beside the paper banger 1m for the 1st palisade (and microphone directed to the 1st palisade). A faint chirp echo is heard in this IR (like at Chichen Itza).
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)
3.636.322.880.540.180.630.930.860.491.02

Early Decay Time EDT (seconds)
0.421.830.170.170.170.170.170.170.170.17

Definition D50
0.670.860.991.001.000.990.991.001.001.00

Clarity C50 (dB)
3.137.9219.4629.8728.4221.4022.9626.3329.2630.19

Clarity C80 (dB)
12.508.7421.7334.2934.4523.6724.0727.0130.3031.24


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Images
Photographs and Diagrams: 
The 2nd palisade in the shadow of the 1st
Goseck from a distance
Herding cats...
Location
Address: 
Goseck solar observatory Goseck, ST
Germany
Attribution
Attribute this work to: 
www.openairlib.net
www.archaeocosmology.org/eng/woodcircleaoucistictestplan.htm
https://www.academia.edu/33589224/Acoustic_and_aural_research_at_timber_and_stone_circles

Neolithic timber circle Pömmelte-Zackmünde, Germany

Information
Description: 
Reconstructed Pömmelte-Zackmünde timber circle (from around 2300 BCE) has: one tightly (~4cm) spaced 1st palisade ring (~75m diameter); one medium (~20cm) spaced (~115m diameter); and two widely (~2m) spaced palisade rings (~45 m and ~55 m diameter). The posts have a diameter of 20cm and a height of 2.5 to 3m. The posts are a little bit crooked and have no bark. The balloon pops (the balloon size along the surface from tip to mouth piece was 45cm) were in the middle of the circle. The binaural microphones were on the ears of a person standing a certain distance from the balloon. 100 Hz high pass filter was used to remove wind noise.
Measurement Team: 
Reinhard Mussik
Victor Reijs
Elke Hockauf
Finn Hockauf
Capture Date: 
Thu, 05/05/2016
Source Sound Category: 
Balloon Pop
Microphone(s): 
binaural, made from two omni directional electret mics
Space Category: 
Arena
Open Air
Generation Type: 
Real World
Analysis
Analysis Description: 
This impulse response (only the left channel of a binaural recording) was recorded when standing 10m from the balloon pop in the centre (and facing the source). A high pass 100 HZ filter was used to remove wind noise.
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)
3.442.771.021.210.920.780.992.081.076.55

Early Decay Time EDT (seconds)
0.190.310.190.190.190.060.060.060.060.06

Definition D50
0.980.990.960.960.980.990.990.990.990.99

Clarity C50 (dB)
16.8718.4913.7014.1416.7520.0320.0018.6522.5221.94

Clarity C80 (dB)
16.9420.1213.7414.1516.8520.1220.0418.7222.6822.23


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Images
Photographs and Diagrams: 
View towards the centre of circle while standing near the 1st palisade
View along the 1st palisade
The crookedness of the (debarked) posts can be seen here (1st palisade)
Location
Address: 
Pömmelte-Zackmünde circle Zackmünde, ST
Germany
Attribution
Attribute this work to: 
www.openairlib.net
www.archaeocosmology.org/eng/megasoundindex.htm
https://www.academia.edu/33589224/Acoustic_and_aural_research_at_timber_and_stone_circles
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