Noise Reduction Coefficient (NRC) has very limited utility in music applications and is often misleading if relied upon for critical listening or recording environments. The NRC is useful in architectural acoustics for improving speech privacy in open spaces like offices…
Understanding Acoustic Absorption Classes When choosing acoustic finishes, you’ll notice helpful data sheets that showcase a letter rating from Class A to Class E, based on the EN ISO 11654 standard. This rating simplifies detailed acoustic lab tests into an easy-to-understand scale that reflects a product’s…
Ideal Reverberation Times (RT60) & Early Decay Time (EDT) Mid-frequency (500 Hz – 1 kHz) targets for RT60 and EDT by room type. Values represent best-practice ranges from: ISO 3382, Beranek, and IEC standards. Categories: Space Volume range RT60 target (s)…
Which Is the Better Guide, RT60 vs EDT? In short, neither is better, as they answer different questions. RT60 is the standardised design metric, whereas EDT provides guidance on how humans perceive the acoustics. RT60 is how long it takes…
I rarely come across well-written, accurate, and concise articles on acoustics, but today I received a link to a piece by Alexandra Plesa, published on Headphonesty. The article is definitely worth reading. You can find it here.
A part extract from the introduction of the standard: ISO 22955:2021 provides technical guidance to achieve the acoustic quality of open office spaces to support dialogue and formal commitment between the various stakeholders involved in the planning, design, construction or…
