Add new comment

This is a very good question
For when we hear two pure tones together WE HEAR BEATS
Of course the ear in non-linear - so that explains that! ....... WRONG
Sine (A) + sine(b) is half the sine of A+B plius half the cosine of A-B (or summat like that)
So the "beats" are REAL - in the air - even BEFORE some ear mangles them up.

The astounding BEAUTY of the whole thing is a pure tone AFTER being horribly mangled by our ear STILL SOUNDS GREAT (even if a little dull).
But the nerve signals sent to the brain are HORRENDOUS!

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.