Tone Generator: Generate Audio Frequencies Online | Free Tool

A The international standard concert pitch. When an orchestra tunes, they tune to A4 at 440Hz.

A This tone generator produces precise *single* audio frequencies (e.g., a pure 500Hz sine wave), not complex broad-spectrum noises like white or pink noise. These broadband noises consist of many frequencies played simultaneously. While you cannot directly generate white or pink noise with this tool for sleep or focus, it's excellent for specific sound therapy, testing, or creating a subtle low-frequency hum (20-100Hz) for a brown noise-like calming effect.

A To locate an unwanted hum or buzz, systematically isolate components. Start by disconnecting all input sources from your amplifier or speakers. If the noise persists, it's likely internal. If it stops, reconnect components one by one. Use the tone generator as a controlled signal (e.g., a 60Hz or 50Hz sine wave to check for ground loops). When the hum reappears, you've identified the faulty component, cable, or power issue.

A To thoroughly test your speakers, start with very low sine waves (e.g., 20-80 Hz) to assess subwoofer and bass response. Gradually move into the mid-range (200 Hz - 2 kHz) for vocal clarity and instrument presence. Finally, test high frequencies (5 kHz - 15 kHz) to check tweeter performance. Always start at low volume and listen for distortion or rattles across the spectrum. This method helps identify weak spots or potential issues in your audio setup.

A Most computer speakers and phone speakers can't reproduce 15kHz+ sine waves cleanly. Try 12kHz instead. If you hear crackling, your hardware is the bottleneck. For a pure test, use headphones rated up to 20kHz.

A Some people use low-frequency tones (around 100-200Hz) to mask tinnitus symptoms. Play a gentle sine wave at a volume just below your tinnitus pitch. Start at 20% volume and adjust slowly. This won't cure tinnitus, but it can provide temporary relief during quiet moments. For best results, pair with a timer app to avoid overexposure.

A No, this tool only outputs sounds from your speakers or headphones. It doesn't process or filter existing audio files. To clean up a recording, you'd need a DAW or noise removal plugin. That said, you can use the tone generator to identify a specific noise frequency in your room, then subtract it manually in editing software. For example, play a 60Hz tone to match a hum, then notch-filter that frequency out.

A Software generators rely on your computer's audio chip and drivers, which introduce slight jitter and latency. A hardware signal generator produces a voltage waveform directly, so it's electrically cleaner. For most testing — like checking speaker rattle or tuning an instrument — software is perfectly fine. But if you're measuring frequency response with precision gear, the difference matters. Try 1kHz sine on both if you have access; you'll hear a faint digital fuzz on the software version.

A Most laptop speakers and phone speakers can't produce 20Hz cleanly — they physically can't move enough air at that low range. You'll need either a subwoofer or studio headphones with a good low-end response (look for ones rated down to 10Hz or 20Hz). Even with a sub, your room might rattle and distort the tone. Test with a 30Hz sine wave first; if it sounds choppy or silent, your gear is the limit. For a real-world check, play 40Hz on decent headphones — you should feel pressure, not hear a clear pitch.

A Stick with sine waves for tuning — they're pure single frequencies without harmonics that can confuse your ears or a clip-on tuner. Triangle waves contain odd-numbered overtones that might make the fundamental pitch harder to lock onto. For guitar, play a 110Hz sine wave for the A string. If your tuner wavers, try the sine wave at 0dB for a clean reference.