Editorial Guidelines

Reverb-Calculator.com publishes five types of content: tool pages explaining how each room acoustics calculator works and how to interpret results, articles about acoustic formulas and RT60 science, articles about room design targets and acoustic specifications for different space types, articles about absorption coefficients and acoustic treatment material selection, and educational content about room acoustics fundamentals.

This page explains how all five content types are researched, written, reviewed, and maintained.

Who Writes the Content

All content on Reverb-Calculator.com is written by Noah Bennett, the site’s founder and sole author. Noah Bennett is an acoustic engineer and room acoustics educator with expertise in RT60 calculation, Sabine and Eyring formula methodology, absorption coefficient science, architectural acoustics, and room design for studios, classrooms, concert halls, and home theatres.

There are no anonymous contributors and no unreviewed content on this site.

Our Editorial Standard

Every piece of content passes one test before publication:

Would an acoustic engineer, architect, studio designer, or educator who found this page feel they learned something technically accurate and practically useful — or would they feel the content was imprecise, oversimplified, or not grounded in established acoustic science?

Technical accuracy and practical relevance are the only measures.

How Tool Pages Are Written

All tools on Reverb-Calculator.com perform mathematical calculations based on established acoustic physics formulas. Tool pages must document: the formula used and its derivation, the units required for each input and what happens when metric versus imperial measurements are used, how to interpret results in the context of room design targets, where the formula’s assumptions break down, and what the tool cannot determine.

For RT60 calculation tools using the Sabine formula, tool pages document:

  • The formula in full: RT60 = 0.161 × V/A (metric) or RT60 = 0.049 × V/A (imperial), where V is room volume and A is total absorption in Sabins
  • The definition of a Sabin: the unit of sound absorption, equivalent to one square metre of perfectly absorptive surface
  • The assumptions underlying the Sabine model: diffuse sound field, uniform absorption distribution, standard room geometry
  • The conditions under which the Sabine formula overestimates RT60: rooms with high average absorption (ᾱ > 0.3), irregular geometries, or highly non-uniform surface treatment

For RT60 calculation tools using the Eyring formula, tool pages document:

  • The formula: RT60 = 0.161 × V / (−S × ln(1−ᾱ)), where S is total surface area and ᾱ is mean absorption coefficient
  • When to use Eyring vs Sabine: Eyring is more accurate for ᾱ > 0.3; both converge for lightly treated rooms
  • The mathematical relationship between the two formulas

Tool pages are not promotional — they document the physics, the calculation, and the limitations honestly.

How Acoustic Formula Articles Are Researched

Acoustic formula articles cover topics including the historical derivation of the Sabine equation (Wallace Clement Sabine, Harvard, 1898), the physics of sound decay in enclosed spaces, how room volume and total absorption interact to determine RT60, the frequency dependence of RT60 (since absorption coefficients vary by frequency), early reflections and their distinction from late reverberation, flutter echo and standing wave formation, and the acoustic significance of clarity (C80) and definition (D50) metrics.

Research draws from:

  • Published acoustic physics and architectural acoustics literature
  • ISO 3382 (measurement of room acoustical parameters) and ISO 12354 (building acoustics)
  • Wallace Clement Sabine’s original publications and their subsequent academic treatment
  • Established acoustic engineering textbooks and reference literature

All formula presentations are mathematically exact. Sabine constants are stated correctly for both metric (0.161) and imperial (0.049) unit systems. Where the Sabine and Eyring models give materially different results, both are documented with a clear explanation of which applies and why.

How Room Design Target Articles Are Researched

Room design target articles document the established RT60 target ranges for specific space types — recording studios, vocal booths, mixing rooms, home theatres, classrooms, lecture theatres, conference rooms, concert halls, opera houses, churches, and others — and explain the acoustic reasoning behind each target range.

Research draws from:

  • ISO 3382 and related international acoustic standards
  • Established acoustic design guidelines from professional bodies
  • Published architectural acoustics reference literature
  • Acoustic consultancy practice standards for specific space types

RT60 target ranges are presented as ranges, not single values, because optimal reverberation time varies with room volume, use case specifics, and personal or professional preference within established bounds. The acoustic reasoning behind each range — why shorter RT60 aids speech intelligibility, why longer RT60 enriches orchestral music, why recording studios need very short RT60 to capture clean audio — is always explained alongside the numbers.

How Absorption Coefficient Articles Are Researched

Absorption coefficient articles cover how sound absorption is measured, how absorption coefficients are expressed as dimensionless values between 0 and 1 across standard octave bands, how different materials perform acoustically (hard surfaces, soft furnishings, dedicated acoustic panels, bass traps), how absorption coefficient varies with frequency (most materials absorb high frequencies more effectively than low), and how to apply published absorption coefficient data in RT60 calculations.

Absorption coefficient values are sourced from published reference tables and attributed to their sources. Where coefficient data varies across published sources, the variation is acknowledged rather than presenting one figure as definitive. The NRC (Noise Reduction Coefficient) — a single-number summary of a material’s absorption performance across mid-frequency octave bands — is documented accurately alongside its limitations as a full-spectrum descriptor.

Our Policy on AI-Assisted Content

Reverb-Calculator.com may use AI writing tools as part of the content drafting process. Every piece of content published is:

  • Reviewed and edited by Noah Bennett personally before publication
  • Fact-checked against established acoustic science sources
  • Rewritten wherever the draft contains formula errors, imprecision, or unsupported claims
  • Held to the same standard as content drafted without AI assistance

We do not publish raw AI output. For formula-based content specifically, all mathematical expressions are verified from first principles before publication.

How Content Is Updated

Content is updated when: a formula presentation is found to contain an error, an acoustic standard is revised, absorption coefficient reference data is updated, or a reader identifies an inaccuracy. Updated articles display a visible last-updated date.

Corrections Policy

If you find a factual error — a formula that does not verify, a constant value that is wrong, a target range that contradicts an established standard, an absorption coefficient value that contradicts its published source — report it via the Contact page. All corrections are reviewed personally and applied promptly.

What We Do Not Publish

  • RT60 formulas with incorrect constants or variables
  • Absorption coefficient values presented without source attribution
  • Room design target ranges presented as single fixed values without range acknowledgment
  • Acoustic claims not grounded in established physics or published standards
  • Content that oversimplifies to the point of technical inaccuracy

Related Pages

These editorial guidelines are written and maintained by Noah Bennett, founder of Reverb-Calculator.com. Last updated: June 2026.

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