Articles tagged “well v2 feature 74”
7 articles covering well v2 feature 74 in acoustic engineering and building design.
Free RT60 Calculator Online — No Signup, Instant ISO 3382 Results
Calculate reverberation time free online. ISO 3382-2 compliant. Sabine + Eyring equations. RT60 per octave band 125Hz–4kHz. WELL v2 Feature 74 compliance check included. No signup required.
Can Everyone Hear Your Calls? Why Open Office Speech Privacy Fails
If you can clearly understand a colleague's phone conversation from 4 metres away, your office STI is above 0.50 — and your speech privacy is non-existent. WELL v2 Feature 74 Part 3 requires STI < 0.50. Here is how to achieve it.
Why Your WELL Acoustic Certification Will Fail: The 5 Errors Most Architects Make
Five calculation errors that cause WELL v2 Feature 74 acoustic certifications to fail at assessment stage — each with the specific number that trips the design. Passing RT60 is necessary but not sufficient. Here is what WELL assessors actually check.
Free WELL v2 Feature 74 Acoustic Calculator — Generate Your Compliance Report
Calculate WELL v2 Feature 74 acoustic compliance free. Parts 1, 2, and 3. RT60, background noise, and speech privacy (STI) checked simultaneously. Generate a WELL F74 compliance report in PDF format.
NRC 0.75 Does Not Mean 75% Absorption — Here Is What It Actually Means
NRC is an arithmetic average of four octave bands. A panel rated NRC 0.75 can have α = 0.40 at 250Hz — and that bass deficiency will make your meeting room fail its WELL F74 assessment at the exact frequency where speech intelligibility lives.
The School Nobody Could Learn In: What ANSI S12.60 Failures Cost Students
35% of UK classrooms fail BS 8233 acoustic targets. The reason is not RT60 — it is STI. Architects design for reverberation time and ignore the speech transmission index calculation that ANSI S12.60 and DIN 18041 actually require. This is what that costs.
WELL v2 Feature 74 Decoded: Every Acoustic Requirement, Every Calculation, Every Clause
WELL Building Standard v2 Feature 74 has three parts with different requirements for RT60, background noise, and speech privacy. Most WELL assessors fail Part 3 because the speech privacy STI calculation is never written down in one place — until now.