音調產生器
產生 20 Hz 至 20 kHz 的音調，可選正弦波、方波、三角波和鋸齒波。注意保護聽力：請從小音量開始。
This browser does not provide the Web Audio API, so tones cannot be generated.
使用方法
- Make sure the volume is low, then press Play (the default volume is deliberately low).
- Change the frequency (20–20,000 Hz) with the slider or the numeric field; it updates live while playing.
- Switch waveforms (sine, square, triangle, sawtooth) to compare timbres.
注意事項
Tones are synthesized on your device with a Web Audio oscillator. What you can actually hear depends on your speakers or headphones — laptop speakers often reproduce almost nothing below 100 Hz or above 16 kHz. Loud sounds, especially high frequencies and square/sawtooth waves, can damage hearing, so always start quietly.
常見問題
- I cannot hear 20,000 Hz — is something broken?
- Usually nothing is broken. The upper limit of hearing decreases with age, and playback hardware has its own limits. Avoid leaving an inaudible high tone playing at high volume.
- What are the 440 Hz and 1000 Hz buttons for?
- 440 Hz is the standard tuning reference (A4) and 1000 Hz is a common reference frequency in audio testing. The buttons jump straight to them.