Gill Heads Mine

Information

Description: 
These Impulse Responses were recorded in a disused mine found near Trollers Gill called Gill Heads Mine. The mine was used to extract Lead and Fluorite and was closed down as recently as the 1980s. Impulse responses were recorded at two sites (labelled site 1 and site 2) inside the mine not more than 30 m from the entrance. For each site there are two sets of impulse responses: One is made with a single directional sound source (IR-1), and the other is made with an array of two directional sound sources pointing in opposite directions in an attempt to better approximate an omni-directional source (IR-2).
Measurement Team: 
Andrew Chadwick
Simon Shelley
Capture Date: 
Tue, 09/07/2013
Source Sound: 
Swept Sine; 20 Hz - 22 kHz ; 30 Seconds
Source Sound Category: 
Swept sine (logarithmic)
Input: 
Genelec 8130A
Microphone(s): 
Soundfield ST450 kit
Generation Type: 
Real World

Analysis

Analysis Description: 
This is the W-channel of the B-format impulse response measured at Site 2 using the two-way loudspeaker array. The file has been truncated and processed by fading out the signal when the reverb tail reaches the noise floor.
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)
2.292.011.331.120.880.710.640.550.470.32

Early Decay Time EDT (seconds)
1.450.941.071.200.940.680.560.430.300.17

Definition D50
0.430.710.750.440.460.750.810.890.930.98

Clarity C50 (dB)
-1.193.914.87-1.12-0.694.826.168.9911.4817.18

Clarity C80 (dB)
0.985.566.400.083.027.269.3612.8615.6122.62


Example Audio



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Impulse Responses

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

Sample Rate: 96 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 5 s
File Size: 1.37 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 5 s
File Size: 1.37 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 5 s
File Size: 1.37 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 1
Bits per Sample: 24
Duration: 5 s
File Size: 1.37 MB
File Format: wav

B-Format: Multichannel: 

Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 24
Duration: 5 s
File Size: 5.49 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 24
Duration: 5 s
File Size: 5.49 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 24
Duration: 5 s
File Size: 5.49 MB
File Format: wav


Sample Rate: 96 kHz
Number of Channels: 4
Bits per Sample: 24
Duration: 5 s
File Size: 5.49 MB
File Format: wav

Images

Photographs and Diagrams: 
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine
Gill Heads Mine

Location

Address: 
Gill Heads Mine
United Kingdom
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Attribution

Attribute this work to: 
www.openairlib.net