Privacy

Every tool on this site — the decibel meter, spectrum analyzer, and noise monitor — processes your microphone audio entirely inside your browser, on your own device. No audio is ever recorded, saved, transmitted, or uploaded to any server. Closing the tab, resetting a session, or navigating away discards it immediately and irreversibly.

This site stores two small preferences in your browser's localStorage, never sent to any server: fdm:theme (your light/dark theme choice) and fdm:calibration (any microphone calibration offset you set, per device). Both live only in your browser and can be cleared at any time by clearing your browser's site data.

This site uses Cloudflare Web Analytics, a cookieless, privacy-focused analytics script that measures aggregate page views and performance without collecting personally identifiable information, setting tracking cookies, or fingerprinting individual visitors.

This site does not currently show advertising. If Google AdSense is introduced in the future, this policy will be updated first, and a consent-management platform will be presented to visitors in the EEA, UK and Switzerland before any ad-related cookies are set, in line with Google's EU user consent policy.

Because this site does not collect personal data through the tools themselves and analytics is cookieless and aggregate, there is generally no personal data held about individual visitors to exercise access, deletion or opt-out rights over. If you believe otherwise or have a privacy question, contact us via the Contact page.