Aalto Acoustics Lab

The Aalto Acoustics Lab Facilities

The Aalto Acoustics Lab has outstanding facilities for sound-related research.
Multichannel chamber with 40 loudspeaker
Photo by Benoit Alary (2019)

They include three anechoic chambers (built in 1970; renovated in 2019), a variable acoustics room (built in 2019), a listening test room which meets the standards of subjective audio testing (built in 1999), three independent sound-insulated booths for headphone listening tests (built in 2011), standard acoustic measurement equipment and systems, such as measurement microphones and amplifiers, accelerometers, signal analyzers, sound level meters, an acoustic impedance measurement system, a laser Doppler vibrometer, and a dummy head. Additionally, the Aalto Acoustics Lab provides excellent audio reproduction systems for research and demonstrations, including reference-quality headphones and many Genelec loudspeakers.

Variable acoustics room at the Aalto Acoustics Lab

The anechoic chambers and the acoustic measurement laboratory were renovated in 2017-2019, and were reopened for use in December 2019. The new wedges are shorter than the previous ones, making the chambers more spacious than before. The wedges absorb mainly high frequencies whereas the low frequencies are absorbed using damped metallic plates behind the wedges. This modern design is both more efficient than traditional techniques in terms of use of space and in terms of absorption at low frequencies.

Futhermore, the sound insulation of the measurement spaces was improved. The background noise level in the anechoic chambers is now less than 0 dB.

Photo by Sebastian Schlecht. (2020).
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