在线麦克风测试 - 实时录音回放与拾音灵敏度检测

Our tool requests temporary microphone access via HTML5 navigator.mediaDevices.getUserMedia() and processes incoming PCM audio samples using Web Audio API AudioWorklet nodes.

No. All audio signal analysis executes 100% locally in your web browser RAM. Zero audio files or voice recordings are uploaded.

Peak speech levels should hover between -18dBFS and -6dBFS. If levels hit 0dBFS, digital clipping distortion occurs.

Static hum is caused by ungrounded USB ports, cheap motherboard audio preamps, unshielded cables, or excessive digital gain boost (+30dB).

Condenser microphones use an ultra-thin charged diaphragm, capturing high vocal detail and wide frequency response. Dynamic microphones use a rugged moving coil, making them ideal for noisy environments.

Cardioid microphones pick up sound exclusively from the front while rejecting rear room noise. Omnidirectional microphones capture sound equally from all 360° angles.

Quiet audio can be caused by low preamp gain on high-impedance dynamic mics (such as the Shure SM7B), requiring an inline pre-preamp like a Cloudlifter or audio interface upgrade.

Pop filters diffuse high-velocity bursts of air emitted by human lips during spoken plosives before the air hits the sensitive microphone diaphragm.

Standard Bluetooth Hands-Free Profile (HFP) compresses microphone audio to 8kHz or 16kHz mono. USB wired or 2.4GHz wireless mics are required for full 48kHz uncompressed audio.

Echo happens when speaker audio bleeds back into an open mic. Wear headphones or enable OS Acoustic Echo Cancellation (AEC).