Koli National Park – Winter


Impulse Responses measured in the forest of Koli National Park in Finland during winter. The ground was covered in snow between 50 cm and 70 cm. Impulse responses were captured at four sites and were measured using a B-format Soundfield microphone. 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 four directional sound sources pointing in different directions in an attempt to better approximate an omni-directional source (IR-2).

Measurement Team: 

Andrew Chadwick
Simon Shelley

Capture Date: 

Thu, 28/03/2013

Source Sound:

Swept Sine; 22 Hz – 22 kHz ; 30 Seconds

Source Sound Category: 

Swept sine (logarithmic)


Genelec 8130A


Soundfield ST450 kit

Space Category: 

Open Air

Generation Type: 

Real World

Waveform Example

This is the W-channel of the B-format impulse response measured at Site 1 using the four-way loudspeaker array. The file has been truncated and processed by fading out the signal when the reverb tail reaches the noise floor.

Audio Examples

Anechoic voice

Attribute this work to: 

Audio Lab, University of York
Andrew Chadwick
Simon Shelley

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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