音訊與麥克風 — 測試與工具

在瀏覽器中測試麥克風 — 開口說話，即時查看波形與 dB 電平錶，檢查峰值電平與本底噪音，並錄下一小段音訊聽聽麥克風實際收錄到的聲音。不會上傳任何資料。

Record your voice online — an in-browser dictaphone with pause and resume, a live waveform, and a player and download for every take. Everything stays on your device; nothing is uploaded.

在瀏覽器中測試你的揚聲器、耳機或耳塞 — 透過左聲道、右聲道或雙聲道播放音調，掃描立體聲音場，幾秒內就能找出哪一側沒有聲音。

測試耳機或喇叭在整個音頻範圍的表現。透過滑桿、預設值與完整掃頻，播放 20 Hz 到 20 kHz 的純正弦音——精確聽出設備在哪裡開始衰減、失真或無聲。

產生 20 Hz 至 20 kHz 的穩定音調。選擇正弦、方波、鋸齒或三角波，輸入精確 Hz 或樂音音名，並可左右平移聲像。

Free online metronome from 20 to 260 BPM. Set the tempo with a slider or tap it in, accent the first beat of the bar, and practice to a sample-accurate click with a beat indicator and measure counter.

Test your room acoustics with MATT-style gated tone bursts. Sweep a crisp Ta-Ta-Ta pattern through your speakers and mark the frequencies where the room blurs the bursts into a smear — the classic articulation test, right in the browser.

Play calibrated test tones in the browser. Step a 1 kHz sine through exact THD levels from 0.001% to 5% and find the distortion you can actually hear, or run a perceptual 20 Hz–20 kHz sweep that should sound evenly loud from end to end.

測試重低音喇叭、喇叭或耳機到底能有多低。播放 20 到 200 Hz 的純正弦音——點選預設值、用滑桿微調，或掃過整個低音範圍，精確找出低頻的極限。

Hear quantization, dithering, and noise shaping for yourself. A pulsing tone steps from 0 down to −90 dBFS, requantized live to 4–16 bits — plain, dithered, or noise-shaped — so you can find exactly where each version disappears.

Test your subwoofer with six synthesized kick drums stepping down from 70 to 20 Hz — each should get deeper, never louder — then sweep one channel from 200 to 40 Hz to find the frequency where bass stops being localizable and set your crossover below it.

測試立體聲、5.1 或 7.1 系統中的每一個喇叭。點擊房間圖上的喇叭，即可單獨在該聲道播放音調，也可自動掃描所有聲道，並用 30–120 Hz 的低音掃頻檢查重低音喇叭。

直接在瀏覽器中用麥克風測量音量 — 即時分貝讀數提供估計 dB SPL 或精確 dBFS，附上峰值、平均與最小值統計，以及日常聲音對照表，不會錄音或上傳任何資料。

Test your hearing range in the browser. A pure tone sweeps down from 22 kHz — tap the moment you hear it to find your upper limit, then a second sweep rises from 10 Hz for your low end, with an age-typical comparison for your result.

在瀏覽器中測試耳機或耳麥 — 透過左聲道、右聲道或雙聲道播放音調，掃描立體聲場，檢查平衡與接線極性，並測驗自己能否分辨左右耳。

Test your stereo setup in the browser. Check the left and right channels and the phantom center, hear the level, timing, and head-shadow cues your brain uses to place a sound, and take a 10-round quiz on where a knock comes from.

Blind test your hearing with real statistics. Guess whether a mystery music clip is 16-bit or crushed to 8-bit, and whether a hi-hat lands in sync with the kick or milliseconds late — vote round by round and see if your score beats pure guessing.