Frequency Clock — Clock + Tone Generator

The frequency clock combines a live digital clock with a tone generator. Set a frequency in hertz (Hz) and press play to hear a clean sine wave, while the current time ticks above. Handy for tuning, hearing tests, sound experiments, or playing a background tone while you work.

What a frequency (Hz) is

Frequency measures how many times a sound wave repeats per second, in hertz. Low numbers are deep bass; high numbers are treble. Human hearing runs roughly 20 Hz to 20,000 Hz. The tone here is a pure sine wave — a single, clean frequency with no overtones.

Play responsibly

Start at a low volume: pure tones can sound louder and harsher than music, and very high frequencies can be uncomfortable. This is a novelty and utility tool, not a medical or therapeutic device — treat any health claims about specific frequencies with healthy scepticism.

Guides about Frequency Clock

Frequency & hertz explained Are Healing Frequencies Real? A Skeptical, Honest Look A skeptical, evidence-based examination of healing frequency and Solfeggio claims, explaining where the beliefs come from and why they remain unproven rather than fact. 5 min read Tone generator uses Playing a Background Tone While You Work or Focus A practical look at using a steady background tone to mask distractions and aid focus while you work, with tips on frequency, volume, and honest expectations. 6 min read Frequency & hertz explained What Is Frequency? Hertz and Sound Waves Explained Simply A plain-English explanation of what frequency and hertz really mean, how sound waves work, the human hearing range, and how to hear different frequencies yourself. 6 min read Clocks & sound Why Pair a Clock With a Tone Generator? Practical Uses A look at the practical reasons to combine a live clock with a tone generator, from timing focus sessions and listening safely to tuning and mindful use of sound. 6 min read

More frequencyclock pages

Tone Generator Generate a pure sine tone at any frequency from 20 Hz to 20,000 Hz. Online Clock A plain, accurate digital clock showing the current time and date.

Frequently asked questions

What frequency should I use?

Any you like within 20–20,000 Hz. 440 Hz is the standard 'A' used for tuning; 432 Hz is a popular alternative. Start quiet and adjust.

Do I need headphones?

No, but they give a cleaner tone. Keep the volume moderate — pure tones can be surprisingly harsh.

Is a specific frequency good for my health?

We make no health claims. This is a fun, practical tone tool; be sceptical of strong 'healing frequency' claims.