Short answer: You can measure decibels on Android without installing an app: open our free sound decibel meter in Chrome, tap Start and allow the microphone. Once calibrated, most phones read everyday sounds from about 40 to 100 dB to within a few decibels. Above roughly 100–120 dB phone microphones clip or compress, and readings are estimates, not legal measurements.
This guide shows how to measure sound levels on an Android phone or tablet step by step: getting the microphone permission right in Chrome, choosing between a browser meter and an app, why two phones can show different numbers, and how noise suppression, calibration and the screen timeout change the reading. A troubleshooting table at the end covers the common problems, from a reading stuck at zero to a meter that stops when the screen turns off.
How to Measure Decibels on Android in Chrome
- Open Chrome and go to sounddbmeter.com. The meter runs inside the page, so nothing is installed.
- Tap Start. Chrome asks to use your microphone: choose Allow (“on every visit”, if offered, so you aren’t asked again).
- Hold the phone at arm’s length with its bottom edge, where the main microphone usually sits, pointing towards the sound. Keep fingers and thick cases away from the microphone holes.
- Watch the reading for 10–30 seconds. Use the average for steady noise and the maximum for short, loud sounds. Leave the meter on dB(A) for “how loud is it and is it safe”.
- Tap Stop to save the session, then copy the result, download a CSV (one value per second) or save a report image.
For placement, distance and averaging in more detail, see our guide on how to measure decibels.
Allowing the Microphone in Chrome on Android
If you tapped “Don’t allow” by mistake, Chrome remembers the choice and the meter stays at zero. There are four places to check:
- On the page: tap the icon to the left of the web address, open Permissions (or Site settings), switch Microphone to Allow and reload.
- In Chrome: menu (three dots) → Settings → Site settings → Microphone. Make sure the microphone is on and the site isn’t in the blocked list.
- In Android: Settings → Apps → Chrome → Permissions → Microphone → Allow. Chrome needs this app permission before any website can use the microphone.
- The privacy switch: Android 12 and later have a Microphone access toggle in Quick Settings and in Privacy settings. When it is off, every app receives silence.
Menu names vary a little between brands and Android versions. Samsung Internet, Edge and Firefox work too, with similar site settings. To confirm the microphone is picking up sound at all, run the microphone test first.
Browser Meter or App?
| Browser meter | Android app | |
|---|---|---|
| Installation | None: open a web page | Download from the Play Store |
| Microphone access | Only while the page is open | Depends on the app’s permissions |
| Screen off | Usually pauses | Some apps keep logging in the background |
| Calibration | Offset saved on your device | Offset or phone profiles, depending on the app |
| Same tool on other devices | Yes: laptop, tablet, iPhone | Usually Android only |
For most checks, such as whether the TV is too loud, how noisy the bedroom is or whether a workshop is near 85 dB, the level where hearing risk starts, the browser is enough. An app makes sense if you need logging with the screen off. We compare both in detail in online decibel meter vs app.
Why Different Android Phones Show Different Readings
Android phones come from dozens of manufacturers, each with its own microphones, placement and audio processing. Most phones have two to four small MEMS microphones tuned for speech, so deep bass and very high frequencies are reduced. Two uncalibrated phones side by side can easily disagree by several decibels, and a budget phone may apply more automatic gain than a flagship.
Phone microphones are good for about 40–100 dB once calibrated. Above roughly 100–120 dB they clip or compress, so a reading of “about 100 dB” next to a concert speaker is a minimum, not the true level. Online decibel meter accuracy explains the limits, and the frequency analyzer shows how your phone’s microphone responds to low and high sounds.
Turn Off Noise Suppression and Voice Focus Features
Phones clean up sound for calls with noise suppression, echo cancellation and automatic gain. These are great for talking and bad for measuring, because they turn steady noise down. Our meter asks the browser to switch them off, but some phones still apply processing at the system level.
- Some brands offer microphone modes such as “voice focus” or noise reduction in call and video settings. If your phone has them, choose the standard or “all sound” mode.
- Disconnect Bluetooth earbuds. While they are connected, the browser may use the headset microphone instead of the phone’s own.
- A sign of processing: a steady fan reads normally for a few seconds, then slowly drops. The background noise test makes this easy to spot, because steady noise should give a steady number.
Calibrate Your Phone for Accurate Readings
Calibration corrects the offset of your particular phone. Measure a steady sound, such as a fan, with a real sound level meter and with your phone at the same spot, then type the reference reading into Match a reference meter in the meter’s Settings. The offset is saved on that device and browser. Our guide on how to calibrate your microphone covers the details. Calibrate again if you change phone, browser or case, or plug in an external microphone.
Even calibrated, a phone is not a certified instrument. Legal and workplace measurements need a Class 1 or Class 2 meter; see sound level meter vs decibel meter.
Keep the Screen On for Longer Measurements
Android usually pauses the microphone for web pages when the screen locks or you switch to another app. For anything longer than a few minutes, set Settings → Display → Screen timeout to the longest option, keep the phone on charge and leave the page in front. (Developer options also have a “Stay awake” setting that keeps the screen on while charging.) To log for hours and record every event over a limit, use the noise monitor.
Android’s Headphone Volume Warnings
Measuring the room is different from measuring what goes into your ears. Many Android phones show a warning when you turn headphone volume up past a certain point, partly because of EU rules for personal music players. Some phones also offer a media volume limiter or headphone exposure tracking; names and features differ by brand and Android version. These features estimate the level from the volume setting rather than measuring it with the microphone. For safe listening times, see the safe noise levels chart or add up a whole day in the noise exposure calculator.
Troubleshooting Table
| Problem | Likely cause | Fix |
|---|---|---|
| Reading stays at zero or never moves | Microphone blocked in the site settings, Chrome’s app permission or the privacy switch | Allow it in all three places and reload |
| Silence during a call or voice search | Another app is using the microphone | End the call, close recorder and assistant apps, reload |
| Reading is much lower than expected | Microphone covered, Bluetooth headset connected, or noise suppression | Remove the case, disconnect Bluetooth, choose the standard mic mode |
| Steady noise fades after a few seconds | Automatic gain or noise suppression | Turn off voice focus modes or try another browser |
| Loud sounds never go above about 100 dB | The microphone is clipping | Treat the value as “at least”; use a proper meter |
| Meter stops when the screen turns off | Android pauses the microphone in the background | Longer screen timeout, keep charging, keep the page open |
| Two phones disagree by several dB | Different microphones and processing | Calibrate each phone against a reference meter |
| Permission is asked on every visit | “Allow this time” was chosen | Choose allow on every visit, or change it in Site settings |
Frequently Asked Questions
Does Android have a built-in decibel meter?
Most Android phones don’t come with a sound level meter. You can install an app or use a browser meter, which works immediately on any phone with Chrome.
How accurate is a decibel meter on an Android phone?
Uncalibrated, readings are often several decibels out. Calibrated against a real meter, a phone is usually within a few decibels for everyday levels between about 40 and 100 dB.
What should a quiet room read?
A quiet bedroom at night is typically 25–35 dB(A), and normal conversation about 60 dB. Room noise levels lists recommended values, and the decibel chart compares everyday sounds.
Can I use my Android phone to record neighbour noise?
Yes, to show a pattern of dates, times and levels. Councils and landlords may still use their own certified meters; see apartment noise complaint levels.
Addito is an audio analysis and sound measurement writer specializing in decibel testing, noise level analysis, sound frequency measurement, and audio engineering tools for creators, audio professionals, students, and everyday users. He creates practical content focused on sound measurement, hearing safety, microphone testing, and acoustic analysis tools.