Microphone Test
Real-time dB meter, visualizer & frequency bands, noise detection, quality grading, record & save up to 10 clips — 100% private.
About the Microphone Test
This Online Microphone Test lets you instantly verify that your mic is working, measure audio levels in real decibels, detect background noise, and analyze frequency response — all directly in your browser with zero uploads and zero data collection.
Use it before a Zoom or Google Meet call, Discord gaming session, podcast recording, or live stream to ensure your audio is clean, balanced, and ready to go.
Privacy & Security
Your privacy is our priority. This microphone test runs entirely in your web browser using 100% client-side processing. No audio data is uploaded to any server, and recordings are stored only temporarily in your browser's memory until you download or clear them.
How to Use
- Click Start Test. Your browser will request microphone permission — click Allow.
- Speak into your microphone and watch the real-time dB meter and visualizer respond.
- Switch between Waveform, Frequency Bars, Circular, and Spectrum views using the Visualizer dropdown or Switch View button.
- Check Frequency Bands (Sub, Bass, Mid, High, Air) to understand your mic's character.
- Use Record to capture a clip and Download to save it as a WAV file.
- Enable Monitor (use headphones to avoid feedback) to hear yourself in real-time.
- Check your Quality Grade (A–F) and Noise Analysis on the right panel.
Understanding dB Levels
Audio levels are measured in decibels (dB). The closer to 0 dB, the louder the signal. Clipping occurs at 0 dB and causes distortion.
- –60 to –30 dB — Very quiet / background noise floor
- –30 to –18 dB — Quiet ambient speech
- –18 to –12 dB — Optimal recording range for voice
- –12 to –6 dB — Loud but safe
- –6 to 0 dB — Risk of clipping — lower input gain
- 0 dB+ — Clipping (distortion) — reduce gain immediately
Common Issues & Fixes
- No Waveform? Check the lock icon in the browser address bar and ensure microphone access is allowed.
- Flat Line / No Signal? Select the correct input device from the Microphone dropdown. Some systems have multiple audio inputs.
- Too Quiet? Increase input gain in Windows Sound Settings (right-click speaker icon → Sound Settings → Microphone → Properties).
- High Noise Level? Move away from fans, AC units, or electrical devices. Enable noise suppression in your OS or use software like NVIDIA RTX Voice.
- Electrical Hum? A 50 Hz or 60 Hz hum usually indicates a grounding issue or interference from nearby electronics. Try a different USB port or use a balanced XLR connection.
Microphone Types
- Dynamic: Durable, great for loud sources, and naturally rejects background noise. Ideal for podcasts and live streams.
- Condenser: Highly sensitive and captures detailed sound. Best for quiet, acoustically treated studio environments.
- USB: Convenient plug-and-play mics with a built-in audio interface. Perfect for gaming and remote work.
- XLR: Professional quality analog mics that require a separate audio interface or mixer to connect to a PC.
Tips for Reducing Background Noise
- Positioning: Place the mic close to your mouth (6–12 inches) so you can lower the input gain and pick up less room noise.
- Pop Filter: Use a pop filter to reduce harsh "P" and "B" plosive sounds.
- Environment: Turn off fans, AC units, and close windows before recording.
- Acoustic Treatment: Add rugs, curtains, or acoustic foam panels to reduce room echo and reverb.
- Software: Use noise suppression software like NVIDIA Broadcast, Discord's Krisp, or OBS filters for real-time cleanup.
For Gamers & Streamers
- Use a boom arm to position the mic 6–8 inches from your mouth, away from the keyboard.
- Enable a noise gate in OBS, Discord, or Voicemeeter to silence background noise between speech.
- Test with your usual game audio playing to simulate real streaming conditions.
- Aim for a peak level between –18 and –6 dB for best stream audio quality.
- Use closed-back headphones when monitoring to prevent audio bleed into the mic.
How to Judge a Good Microphone Level
Normal speaking should push the dB meter to around –18 to –12 dB without constantly hitting the red zone. If the meter barely rises above –40 dB, increase your input gain or move closer to the mic. If it consistently peaks near 0 dB and clips, lower the gain to prevent distortion.
Before calls or streams, also check the Sound Test and Webcam Test for a complete browser-based audio and video preflight.
Frequently Asked Questions
Why can't I hear myself during the test?
By default, monitoring is disabled to prevent feedback loops (the screeching noise when your mic picks up your speaker output). Click the Monitor button to hear yourself — always use headphones when monitoring to avoid feedback.
What microphone types are supported?
All standard browser-accessible microphones work: built-in laptop mics, USB microphones, Bluetooth headsets, webcam mics, gaming headsets, and professional XLR mics connected via USB audio interfaces.
What do the frequency bands mean?
Sub (20–80 Hz): rumble and low hum. Bass (80–300 Hz): warmth in voice. Mid (300–3000 Hz): speech clarity. High (3–8 kHz): presence and crispness. Air (8–20 kHz): brightness and sparkle.
What does the Quality Grade mean?
Grade A: Excellent signal, clean audio, optimal level. Grade B: Good signal with minor noise or level issues. Grade C: Moderate noise or low level — suitable but could be better. Grade D: High noise or very low/high level — needs improvement. Grade F: Mic may be malfunctioning, muted, or severely noisy.