Acoustic Index

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Acoustic Index

The database for acoustic material data. Professional measurement results per ISO standards.

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Acoustic Index

Search API Reverberation calculator

For professionals For manufacturers

Acoustic Index

The database for acoustic material data. Professional measurement results per ISO standards.

Products

Absorbers
Diffusors
All products

Company

About
Contact
For manufacturers

Tools

Read API
Reverberation calculator

Legal

Imprint
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Lightly upholstered chair, unoccupied – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

Acoustic Index

Search API Reverberation calculator

For professionals For manufacturers

AudienceLow-frequency absorber

Data source

PTB reference data

Physikalisch-Technische Bundesanstalt

Source: JASA 104 (6) Dec 1998

Lightly upholstered chair, unoccupied

PTB reference data

Original description

Material properties

Thickness: 1.5 cm (front of seat back), 2.5 cm (top of seat bottom)

Measurement data

Sound absorption

ISO 354 – reverberation chamber

αw

0.59

Frequency values

αp nach ISO 11654

125 Hz

0.35

250 Hz

0.45

500 Hz

0.65

1000 Hz

0.70

2000 Hz

0.70

4000 Hz

0.65

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Method (354): Measured

Acoustic Index

The database for acoustic material data. Professional measurement results per ISO standards.

Products

Absorbers
Diffusors
All products

Company

About
Contact
For manufacturers

Tools

Read API
Reverberation calculator

Legal

Imprint
Privacy
Terms
Terms of use