← The Frequency Generator The Notebook

The Notebook

Four short reads. Everything here pairs with the generator — open both tabs and try things as you go.

Explainer

What is a frequency generator actually used for?

Speaker tests, tinnitus matching, physics homework — and one famous use that doesn't work.

Ear training

Sine vs square vs triangle vs sawtooth

Same pitch, four personalities. Harmonics explained by listening, not math.

How-to

Test your speakers' frequency range at home

Ten minutes, zero equipment, and you'll know where your speakers give up.

Skeptical

Binaural beats: what the science actually says

Less than the thumbnails promise. More than nothing. Details inside.