Reverb-Calculator.com is committed to making its tools and educational content accessible to the widest possible range of users, including people with disabilities. This statement explains our current accessibility status, what we have implemented, known limitations, and how to contact us if you encounter a barrier.
Our Commitment
We believe that anyone making decisions about room acoustics — acoustic engineers, architects, studio designers, educators, home recording musicians, or home theatre enthusiasts — deserves access to calculation tools and educational content that support their work regardless of disability, device, or technical setup.
Reverb-Calculator.com aims to conform to the Web Content Accessibility Guidelines (WCAG) 2.1 at Level AA — the internationally recognised standard for web accessibility published by the World Wide Web Consortium (W3C).
Accessibility is an ongoing commitment. Identified barriers are addressed through our own review or user feedback.
Current Accessibility Status
Reverb-Calculator.com is substantially conformant with WCAG 2.1 Level AA. This site’s core tools are fully accessible because all calculations are performed on typed numeric input and results are returned as text. No audio input or output is involved, and no microphone access is required.
What We Have Implemented
Keyboard navigation. Core site navigation — menus, links, and page structure — is fully accessible via keyboard. Tab to navigate, Enter to activate links and buttons.
Tool input accessibility. All tool input fields — room volume, surface area, and absorption coefficient inputs — have associated labels, are keyboard accessible, and work with screen readers. The RT60 calculators can be operated entirely without a mouse.
Result accessibility. All tool results are returned as text — RT60 in seconds, with contextual interpretation against room type targets. These results are fully accessible to screen readers.
Text readability. Body text at minimum 16px with sufficient line spacing. Heading levels (H1, H2, H3) follow correct hierarchical order throughout, allowing screen readers to navigate content structure logically.
Colour contrast. Text and background colour combinations meet or exceed WCAG 2.1 Level AA minimum ratios — 4.5:1 for normal text, 3:1 for large text.
Descriptive link text. Links describe their destination — no generic “click here” or “read more.”
Alt text on images. Meaningful images include descriptive alt text. Decorative images use empty alt attributes.
Responsive design. The site adapts to all screen sizes without horizontal scrolling at 200% zoom.
No auto-playing media. No audio plays automatically without user action.
Page titles. Every page has a unique, descriptive title tag.
Skip navigation link. A “Skip to content” link is available at the top of every page.
The Tools Are Fully Accessible Without Audio or Hearing
Unlike microphone-based acoustic measurement tools, the RT60 calculators on Reverb-Calculator.com require no audio input and no hearing to operate. This means they are fully usable by:
- Users who are deaf or hard of hearing
- Users who cannot access or produce sound
- Users in any acoustic environment
- Users without a microphone
The Sabine and Eyring RT60 calculators accept typed room dimensions and absorption coefficient values as input and return reverberation time in seconds as text output. Screen reader users receive the same complete numerical results as sighted users.
Professional acoustic measurement of RT60 does require specialised audio equipment — but that is a characteristic of professional measurement practice, not of the calculation tools on this site. The tools here calculate RT60 from formula inputs, not from audio measurement.
Known Limitations
Results and Reference Tables
The How It Works page and educational content include tables presenting RT60 target ranges, absorption coefficient values, and formula reference data. Tables include proper header markup and are navigable by screen readers using standard table navigation commands. We are reviewing whether additional ARIA labels or summary descriptions would improve the navigation experience for screen reader users working with larger reference tables.
Formula Notation
Some pages present acoustic formulas using mathematical notation (exponents, subscripts, Greek letters such as ᾱ for mean absorption coefficient). In standard HTML text, these are rendered as plain text equivalents where possible. We are reviewing whether MathML or accessible formula markup would improve the experience for screen reader users working with formula content.
Third-Party Content
If advertising or third-party content is added to this site in future, the accessibility of those elements will depend in part on third-party providers. Any such addition will be reviewed for accessibility impact before implementation.
Educational Content Accessibility
All educational articles on Reverb-Calculator.com — covering RT60 science, acoustic formulas, room design targets, absorption coefficients, and room acoustics fundamentals — are written as text-based content fully accessible to screen readers and keyboard navigation. No audio is required to access any educational content on this site.
Assistive Technology Compatibility
Tested with:
- Screen readers: NVDA with Chrome (Windows), VoiceOver with Safari (macOS and iOS)
- Keyboard-only navigation: Chrome and Firefox on Windows
- Browser zoom: Content tested at 200% zoom without loss of functionality
- High contrast mode: Core content remains readable in Windows High Contrast mode
We recommend Chrome or Firefox with your preferred assistive technology.
Feedback and Contact
If you experience a barrier on any page or tool — a field that cannot be reached by keyboard, a result not accessible to your screen reader, a formula that is difficult to interpret, or any other accessibility issue — please contact us.
Contact: reverb-calculator.com/contact
Include the page or tool, the assistive technology and browser, and what you expected versus what happened. We respond to all accessibility feedback personally within 7 business days.
Formal Complaints
If you are not satisfied with our response, you may contact the relevant national enforcement body in your country.
Review Schedule
This statement is reviewed and updated at least once per year, or whenever significant changes are made to the site’s tools or structure.
Related Pages
- How It Works — how each tool calculates RT60
- Reverb Calculator FAQ — common questions
- Contact — report an accessibility barrier
This Accessibility Statement is written and maintained by Noah Bennett, founder of Reverb-Calculator.com. Last updated: June 2026.