Audio tools with honest limits.
Frequency Test is a free browser-based lab for exploring hearing range, checking headphones and speakers, and generating precise audio tones.
Why this site exists
Many online tools blur three different questions: “What can I hear?”, “What can my equipment reproduce?” and “Can I generate a specific signal?” Frequency Test gives each question its own workflow while sharing a transparent, safety-conscious audio engine.
What we value
- Clarity: hearing tests and equipment tests are kept conceptually separate.
- Privacy: local audio generation, no microphone and no account requirement.
- Transparency: visible methodology, device limits and non-medical language.
- Useful restraint: no fake dB precision, exact “ear age” or automatic hardware diagnosis.
Technical approach
The site is statically generated with Astro and TypeScript. Audio is synthesized with the browser’s Web Audio API. No database, CMS or server-side test API is required.
Corrections and feedback
To report a technical issue or suggest a correction, email hello@frequencytest.org. Please do not send private medical information.