左右チャンネルのテスト方法は？

ステレオテストを再生して各側を確認します。

マイク入力はテストできますか？

はい。マイク許可を与えるとレベルとピークを表示します。

周波数スイープの目的は？

歪みや欠損帯域を確認するのに役立ちます。

What is the difference between white noise and pink noise?

White noise has equal energy at all frequencies, making it sound 'hissy' like TV static. Pink noise has equal energy per octave, which sounds more balanced to human ears and more closely resembles the frequency spectrum of typical music. Pink noise is often used for audio calibration and speaker testing, while white noise is useful for hearing high-frequency hiss or detecting specific audio problems.

Why can't I hear the bass frequencies?

If you can't hear frequencies below 80-100Hz, your speakers or headphones likely cannot reproduce deep bass. Laptop speakers and small earbuds typically don't reproduce frequencies below 150Hz. Bass requires larger speaker drivers or headphones with good low-frequency response. Subwoofers are designed specifically for bass reproduction (20-80Hz). The frequency sweep test helps you determine the lowest frequency your audio equipment can clearly reproduce.

オーディオテスター

チャンネル、スイープ、マイク入力を確認

フロントエンド専用のオーディオスイート：ステレオ音声の左右コールアウト、手動サイン波・対数スイープ、ホワイト/ピンクノイズ参照、マイクレベルとピークメーター。

チャンネル＆参照信号

入力待ち

再生ビジュアライザ

アイドル

トーン、スイープ、チャンネルコールアウト、ノイズ再生の出力エネルギーを表示します。

単一サイン波

20 Hz - 20 kHz

440 Hz

ログスイープ

20 Hz - 20 kHz

低域から高域までのワンクリックスイープ。周波数特性や共振を確認できます。机のビビりやサブウーファーの低域確認にも便利。既定の長さは9秒。

参照ノイズ

マイクレベル

ブラウザがマイク許可を求めます。処理は端末内で行われ、アップロードされません。

現在のレベル0%

ピーク保持0%

「モニタリング開始」をクリックしてマイク許可を与え、レベルとピークを表示します。

クイックヒント

左右交互モードでチャンネルマッピングを素早く確認。
スイープでビビりや異音を検出。スパイクは共振や歪みの可能性。
ホワイトノイズはサーというノイズを強調、ピンクノイズは一般的な音楽スペクトルに近い。
マイクゲインを上げすぎないようにし、ピークは70〜90%を目安にしてクリップを抑える。

What is an Audio Test?

An audio test verifies your speakers, headphones, and microphone are working correctly. It checks stereo left-right balance, plays frequency sweeps to detect distortion or missing ranges, and monitors microphone input levels. Perfect for troubleshooting audio issues, testing new headphones, or verifying your recording setup. This browser-based tester requires no installation—just open and test.

How This Online Audio Test Works

Our audio tester uses the Web Audio API to generate test tones, noise signals, and frequency sweeps directly in your browser. For speaker testing, we synthesize sine waves at specific frequencies and route them to left or right channels. For microphone testing, we access your mic through the MediaDevices API and display real-time level meters. All audio processing happens locally—no audio is recorded or sent to servers.

Accuracy and Limitations

This browser-based test accurately generates audio signals and measures microphone input levels. However, there are limitations: Very low bass frequencies (<50Hz) require capable speakers. Very high frequencies (>16kHz) may be inaudible to some users. Microphone sensitivity readings are relative, not calibrated. For professional audio calibration, dedicated measurement tools are recommended.

How to Interpret Your Results

Channel Balance

Audio should play clearly from left and right speakers independently. If one channel is silent or quiet, check speaker connections, audio settings, or balance controls.

Frequency Response

The frequency sweep reveals your speakers' range. If bass or treble drops off dramatically, your speakers may have limited frequency response.

Microphone Level

The mic meter should respond to your voice. No movement indicates a muted or disconnected mic. Constant high levels may indicate feedback or noise issues.

オーディオテストFAQ

スピーカー、ヘッドホン、マイクに関する質問。

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About This Test

Methodology: Our testing methodology uses standard Web APIs (Web Audio API, MediaDevices API) supported by all modern browsers. Tests generate accurate audio signals locally.

About: HardwareTest provides free, privacy-first hardware diagnostics. All audio is generated and processed locally with no recording or data collection.

Disclaimer: This tool provides browser-based audio testing. Results depend on your speaker/headphone quality and system audio settings. For professional calibration, specialized equipment is recommended.