Microphone Record Test: Record, Play Back and Hear Your Mic
Click Record (Processed) and Record (Raw) on this microphone record test to compare both playback clips. The check microphone input levels needs a quick permission prompt the first time you run it, then gives you a live read-out in seconds.
Before a video call or podcast recording, the quickest way to test your microphone is to hear it yourself. This free microphone record and playback tool, a quick microphone record test, captures a short clip in your browser and plays it back, so you can compare what you said with what others will hear. Pair it with the webcam and camera check on this site.
How Microphone Record and Playback Works
Click Start Microphone Test (some tools say Start Mic Test), then Allow in the pop-up. The sound bars move in real-time as you talk, and the sound waves confirm that audio input is reaching the page. An offline status means no device has access yet. The check speaker output quality needs a quick permission prompt the first time you run it, then gives you a live read-out in seconds.
Press the Record Button and Speak
Press the record button and speak for five to ten seconds at your normal distance. Read a line with hard and soft consonants, such as "Peter packed six crisp biscuits", to expose popping and hissing, and watch the levels in the interface. Short audio clips are enough.
Listen Back to Your Recorded Voice
Stop the take and press play. Listen to your recorded voice on headphones, since speakers mask hiss and echo. Check clarity, distortion on loud syllables, and the gaps between words, where hum shows up first. Playback tells you what listeners hear, not only whether the mic works.
Reading Your Mic Test Results
The tool measures peaks against digital full scale (dBFS), where 0 dBFS is the loudest value before clipping. These test results describe the captured audio, not your room:
$$\text{dBFS} = 20 \times \log_{10}(A_{peak})$$
Here \(A_{peak}\) is the highest sample amplitude on a scale of 0 to 1.
Volume Level and Background Noise in Decibels
Take an 8-second clip whose loudest syllable reaches an amplitude of 0.282. That gives a volume level of \(20 \times \log_{10}(0.282) = -11\) dBFS. In the silent half-second before you spoke, the noise level meter reads 0.000708, or −63 dBFS of background noise. The gap between them is your signal-to-noise ratio: −11 − (−63) = 52 dB, measured in decibels. Speech peaks between −12 and −6 dBFS leave headroom; if yours sit lower, raise the gain or sensitivity rather than leaning closer.
Frequency Response and Sample Rate
On playback, frequency response is what you hear as a thin or boomy take: it shows which pitches a mic favours. A large-diaphragm condenser in a treated studio replays fuller than a laptop mic in a bare acoustic space. Browsers usually record at a sample rate of 48,000 Hz with a 16-bit sample size, so the 8-second mono clip above is 768,000 bytes before compression.
Echo Cancellation and Noise Suppression Settings
Here is what each property in the microphone information panel means, with readings from the example clip:
| Property | What it tells you | Example reading |
|---|---|---|
| Echo cancellation | Removes speaker output that leaks back into the mic | On |
| Noise suppression | Filters steady hiss and hum | On |
| Automatic gain control | Raises or lowers the level on the fly | On |
| Audio channels | Mono (1) or stereo (2) | 1 |
| Sample rate | Samples captured per second | 48,000 Hz |
| Sample size | Bits stored per sample | 16-bit |
| Estimated latency | Delay from mouth to buffer | 10.7 ms (512 samples) |
| Quality rating | Summary of the readings above | Good |
For a raw check, switch these filters off: noise reduction and calibration can hide a weak mic.
Checking an Audiobook Audition with a Microphone Test
I'm about to submit a 22-second audition to an audiobook producer, recorded on a laptop with a USB condenser mic. The decision: will the raw file pass ACX's published checks (peaks no higher than −3 dBFS, a noise floor no higher than −60 dBFS), or does the room need fixing first? The first take fails on noise, not on volume. The microphone quality and spectrum analyzer needs a quick permission prompt the first time you run it, then gives you a live read-out in seconds.
I open the microphone record and playback check and switch echo cancellation, noise suppression and automatic gain control off where the panel allows, so the reading matches the raw file. Then I read the audition's opening paragraph 15 cm from the grille, leaving two seconds of silence before the first word.
Playback sounds clean on headphones, but the readings disagree. The loudest peak has an amplitude of 0.437, so 20 × log10(0.437) = −7.2 dBFS, comfortably under the −3 ceiling. The silent lead-in reads 0.00129, or −57.8 dBFS: 2.2 dB too noisy. To pass, the floor amplitude has to fall below 0.001, which is exactly −60 dBFS. I cross-check both by hand with the dBFS formula above, and they match the meter.
The laptop fan is the obvious suspect, so I unplug the charger, wait for the fan to spin down and record again with nothing else changed:
| Take | Peak | Noise floor | Gap |
|---|---|---|---|
| 1: fan running, 15 cm | −7.2 dBFS | −57.8 dBFS | 50.6 dB |
| 2: fan off, 15 cm | −7.2 dBFS | −62.0 dBFS | 54.8 dB |
| 3: fan off, 22 cm (calculated) | −10.5 dBFS | −62.0 dBFS | 51.5 dB |
Take 2 passes with 2.0 dB of margin on the noise floor. Take 3 is the move I'd be tempted to make to soften plosives, and the numbers show why I won't: backing off from 15 to 22 cm costs 20 × log10(15/22) = 3.3 dB of voice while the room stays exactly as loud, so the gap shrinks and any later normalising lifts the hiss with it. A pop filter fixes plosives without that cost.
One caveat matters more than the rest. With noise suppression left on, take 1 would have shown a floor far below −60 dBFS, because the filter pushes silence down. That figure describes the processed stream, not the file a producer measures, so for any submission with a published noise spec, test with processing off or confirm the exported file in an editor. The peak reading also says nothing about ACX's loudness window (−23 to −18 dB RMS), so that is the next check before I upload.
Microphone Testing Troubleshooting
If the meter stays flat, first check that the mic is connected and unmuted.
Fix Microphone Permissions in Your Browser
A blocked mic is the most common failure. Click the camera or lock icon in the address bar and switch access back on. Chrome, Edge, Firefox and Safari keep per-site microphone permissions, so an old "Block" sticks until you reset it.
Choose the Default Input Device in Sound Settings
Laptops often favour the built-in mic over an external USB headset. On Windows, pick the right default input device in Sound settings; on macOS, choose it in System Settings.
Drivers, Firewalls and Other Apps
- If no app can hear the mic, update its drivers.
- If only a work machine fails, a firewall or IT policy may be blocking access.
- To test microphone hardware outside the browser, try Zoom, Skype or FaceTime; if it works there, the fault is browser-side.
Test Your Microphone on Any Device
To test your mic you need only a mic the system recognises; mobile and desktop work the same way.
Operating System and Browser Requirements
Any current operating system works: Windows, macOS, Linux, Android or iOS, with an up-to-date browser. Dark mode changes only the interface, never the take.
Use the Mic Tester on a Phone
The mic tester runs on a phone the same way: tap record, talk, play it back. Handset mics sit close to your mouth, so peaks run hotter; hold it about 20 cm away. A mic test tool on mobile also checks a Bluetooth headset before a call.
Free Audio Testing with No Downloads
Audio testing here is web-based: no downloads, nothing to install. The mic tester records and replays inside the page, so you can run a free mic test again after each settings change and make as many recordings as you need.
Use a Mic Check for Better Audio Quality on Video
A 30-second mic check before each meeting catches most problems. Re-record after every change (moving closer, closing a window, switching mics) and compare takes. Once playback is clear, run the camera check too, because audio quality and picture both shape how you come across on video. A podcast in a home studio deserves the same microphone test before the first take, with the mic tester as reference.
Frequently Asked Questions
- How do I record and play back my microphone online?
- Click Start, allow microphone access in the browser pop-up, press record and speak for five to ten seconds, then stop and press play. Listen on headphones so speakers don't hide hiss or echo.
- Why can't the tool hear my microphone?
- The browser is usually blocking it. Click the camera or lock icon in the address bar, allow the microphone for this site and reload. Also check that the mic is connected, unmuted and set as the default input device in your system's sound settings.
- How do I switch between several microphones?
- Pick the mic you want in the browser's site settings or make it the default input device in Windows or macOS sound settings, then record a new clip so you hear the new mic rather than the old one.
- What do the volume level and background noise readings mean?
- Peak level is the loudest moment of your take in dBFS, where 0 is clipping; speech peaks of about -12 to -6 dBFS are a safe target. Background noise is the level in the silence before you speak, and the gap between the two is how far your voice sits above the room.
- How is the quality rating worked out?
- It adds points for the mic's settings: 200 for a 48,000 Hz sample rate, 100 for two channels, 50 each for automatic gain control, echo cancellation and noise suppression, and 100 for latency under 100 ms, out of 550. It describes the input settings, not how good your voice sounds, so always judge the playback too.
- Can I test the mic on my phone?
- Yes. The recorder works in current mobile browsers on Android and iOS. Phone mics sit close to your mouth, so hold the handset a little further away if your peaks run hot.
- Do I need to install any software?
- No. Recording and playback run in the browser, so there is nothing to download or install and you can repeat the test as often as you like.
- My mic works here but not in another app. What now?
- The other app has its own input setting and permission. Choose the same microphone inside that app, check the operating system's privacy settings allow it, and on work machines ask IT whether a policy or firewall is blocking access.