To determine waves frequency you must know the what

Well, as far as the arithmetic is concerned, it could happen
in two different ways:

-- If you know the wave's 'period', that's enough right there. 
The frequency is just the reciprocal of the period.  That is,  1/period .

-- The other way, you need to know both the wave's speed and
its wavelength.  Then 
                                   Frequency = ( speed / wavelength ) .

Ifound this on google “the middle ear contains three tiny bones known as the ossicles: malleus, incus, and stapes. the ossicles were given their latin names for their distinctive shapes; they are also referred to as the hammer, anvil, and stirrup, respectively.” i hope this you for what your looking for