Observed arrival · 2026-10-01

HowLoud: a sound meter in your browser

howloud.org Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

HowLoud turns a phone or laptop microphone into a browser-based decibel meter, with live readings, A- or Z-weighting, session statistics and a 60-second chart.

Landing page captured for the 2026-10-01 issue.

For: People comparing everyday noise levels
Worth noticing: It distinguishes energy-averaged Leq from an arithmetic mean and warns that built-in microphones may clip above 100–110 dB.

Field notes

The interface separates A-weighted readings, intended to approximate human hearing, from flat Z-weighted readings. Its calibration slider applies a fixed offset remembered on the device, while the guidance warns that operating-system gain control and noise suppression can affect results. The page recommends certified Class 1 or Class 2 equipment for legal or occupational assessments.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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