Articles tagged “acoustic testing”
6 articles covering acoustic testing in acoustic engineering and building design.
ISO 3382: The Complete Guide to Room Acoustic Measurement
Master ISO 3382 room acoustic measurement — RT60, EDT, C50, C80 parameters explained with field examples, equipment lists, and common pitfalls.
NRC vs αw vs SAA: Three Ways to Measure Absorption
Understand the differences between NRC, weighted sound absorption coefficient (αw), and SAA ratings with practical guidance on which metric to specify.
Absorption Coefficient Testing: Why Lab Results Don't Match Your Installed Ceiling
ISO 354 lab absorption coefficients routinely overstate real-world performance by 20–40%. Here's why, and how to adjust your acoustic calculations accordingly.
ASTM C423 Absorption Testing: Test Method, Mounting Types, and Why Results Vary
ASTM C423 is the US standard for measuring sound absorption coefficients in a reverberation room. This guide explains the test method, mounting types A–J, NRC calculation, and why the same product can yield very different results.
How to Measure RT60: Interrupted Noise vs Impulse Response vs MLS
A practical comparison of the three ISO 3382-compliant methods for measuring reverberation time: interrupted noise, impulse response (balloon pop, starter pistol), and MLS/swept sine. Covers equipment requirements, measurement positions, T20 vs T30 vs T60 evaluation ranges, and common errors.
How to Measure Room Acoustics: Equipment, Methods, and What the Numbers Mean
Measuring room acoustics requires a sound source, a microphone, and analysis software — but the method you choose determines whether your results are valid. Here is a practical guide to acoustic measurement: from balloon pops to dodecahedron speakers, from smartphone apps to ISO 3382-compliant equipment.