VocalRangeCalculator.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, the known limitations of our tools for certain users, what we have done to support accessibility, and how to contact us if you encounter a barrier.
Our Commitment
We believe that everyone curious about vocal range, pitch science, singing technique, or the voice types of famous singers deserves access to tools and information that help them explore those topics — regardless of disability, device, or technical setup.
VocalRangeCalculator.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). These guidelines define how to make web content more accessible to people with visual, auditory, motor, cognitive, and speech-related disabilities.
Accessibility is an ongoing commitment. When barriers are identified — through our own review or through user feedback — we work to address them.
Current Accessibility Status
VocalRangeCalculator.com is partially conformant with WCAG 2.1 Level AA. Partially conformant means that some parts of the website do not yet fully meet the standard. Known gaps are disclosed in the Limitations section below.
What we have implemented
Keyboard navigation. Core site navigation — menus, links, and page structure — is accessible via keyboard. Users who cannot use a mouse can navigate between sections using the Tab key and activate links with Enter.
Text readability. Body text is set at a minimum of 16px with sufficient line spacing to support readability for users with dyslexia or low vision. Heading levels (H1, H2, H3) follow correct hierarchical order throughout the site, allowing screen readers to navigate content structure logically.
Colour contrast. Text and background colour combinations are chosen to meet or exceed the WCAG 2.1 Level AA minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text.
Descriptive link text. Links describe their destination — not generic phrases such as “click here” or “read more.” This benefits screen reader users who navigate by cycling through links.
Alt text on images. Meaningful images include descriptive alt text. Decorative images use empty alt attributes so screen readers skip them appropriately.
Responsive design. The site adapts to screen sizes from small mobile devices to large desktop monitors. Content reflows cleanly without horizontal scrolling at standard zoom levels up to 200%.
No auto-playing media. No audio or video begins playing automatically without user action.
Page titles. Every page has a unique, descriptive title tag, allowing users navigating between browser tabs or using a screen reader to identify their location.
Skip navigation link. A “Skip to content” link is available at the top of every page, allowing keyboard and screen reader users to bypass navigation and reach page content directly.
Tool Accessibility: A Note on the Frequency to Note Converter
Before disclosing the limitations of the voice-dependent tools, it is worth noting that one tool on this site — the Frequency to Note Converter — is fully accessible to users who cannot vocalise or who do not have a microphone.
The Frequency to Note Converter requires no microphone access, no voice production, and no audio of any kind. It accepts a typed number (a frequency in Hz) via a standard keyboard input field and returns the corresponding musical note and cents deviation. The input field has an associated label, the result is displayed as text, and the entire interaction is keyboard accessible and screen reader compatible.
For users with voice disabilities or those without microphone access, the Frequency to Note Converter is the tool on this site most suitable for independent use.
Known Limitations
Voice and Microphone Dependency
Six tools on VocalRangeCalculator.com — the Vocal Range Calculator, Vocal Range Tester, Voice Type Test, Pitch Detector, Octave Range Test, Vocal Range Comparison, and Vocal Register Test — require access to a functioning microphone and the ability to produce sustained vocal sound to generate results.
These tools are not usable by people who are unable to vocalise or who do not have a working microphone on their device. This is an inherent constraint of the tool’s purpose — measuring vocal range requires vocal sound — not a design oversight. Users who cannot use these tools directly can still access all of the site’s educational content and the Frequency to Note Converter.
Real-Time Pitch Display
During active voice testing, the Pitch Detector and other microphone tools display the current detected note name, frequency in Hz, and tuning position in real time. These rapidly updating values are not currently announced by screen readers during active vocalisation — frequent live announcements during singing would interfere with the testing process. The final result summary is the accessible output for screen reader users.
Vocal Register Test Interface
The Vocal Register Test involves guided steps that move through different registers in sequence — chest voice, mixed voice, and head voice. The register progression display and passaggio identification output are currently presented primarily as visual elements. We are working to improve ARIA labelling and text-based result summaries for the register test output so that screen reader users receive equivalent result information.
Voice Type Classification Output
The Voice Type Test and Vocal Range Calculator display voice type results with visual styling elements (colour-coded classifications, visual range charts). Text equivalents are present in the page content, but the visual chart representations do not have full screen reader equivalent descriptions in their current form.
Third-Party Advertising
This site may display advertisements served by Google AdSense. The accessibility of individual ad creatives is outside our direct control as ads are provided by third-party advertisers.
Text Alternatives for Tool Results
We recognise that the microphone-based tools are not accessible to all users. The following text-based educational pages provide the knowledge the tools are built around and are fully accessible without microphone use:
- What Is Vocal Range — foundational explanation of how vocal range is defined and measured
- Vocal Range Chart — standard voice type ranges presented as text and visual reference
- Typical Vocal Ranges — typical ranges across voice types, age groups, and training levels
- Voice Types — full guide to soprano, mezzo-soprano, contralto, tenor, baritone, and bass
- Chest Voice vs Head Voice — explanation of vocal registers without tool use
- Vocal Fach System Explained — classical voice classification without measurement
- Vocal Range of Famous Singers — documented singer ranges as text reference
- How It Works — technical explanation of how the tools measure what they measure
- Frequency to Note Converter — fully keyboard-accessible pitch conversion tool requiring no voice
These pages are designed to be fully usable with screen readers and keyboard navigation.
Assistive Technology Compatibility
VocalRangeCalculator.com has been tested for basic compatibility with the following assistive technologies:
- Screen readers: NVDA with Chrome (Windows), VoiceOver with Safari (macOS and iOS)
- Keyboard-only navigation: Tested in Chrome and Firefox on Windows
- Browser zoom: Content tested at 200% zoom without loss of content or functionality
- High contrast mode: Core content remains readable in Windows High Contrast mode
We recommend using an up-to-date version of Chrome or Firefox with your preferred assistive technology for the most consistent experience.
Feedback and Contact
We welcome accessibility feedback. If you experience a barrier on any page or tool on VocalRangeCalculator.com — a result not announced by your screen reader, a control that cannot be reached without a mouse, or any other accessibility issue — please let us know.
Contact: vocalrangecalculator.com/contact-us
Please include:
- The page or tool where you experienced the issue
- The assistive technology and browser you were using
- A description of what you expected and what happened instead
We review all accessibility feedback personally and aim to respond within 7 business days. Where a reported barrier is confirmed, we will work to address it and update this statement accordingly.
Formal Complaints
If you are not satisfied with our response to an accessibility concern, you may contact the relevant national enforcement body for accessibility standards in your country. In the United Kingdom, this is the Equality and Human Rights Commission. In the United States, the relevant body depends on the context of the accessibility complaint.
Review Schedule
This accessibility 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 measures what it claims to measure
- Troubleshooting — fix technical issues with tools
- Frequency to Note Converter — the fully accessible tool on this site
- FAQ — common questions about tools and results
- Contact — report an accessibility barrier
This Accessibility Statement is written and maintained by Conan, founder of VocalRangeCalculator.com. Last updated: June 2026.