The formula to calculate the frequency is:
๐ =๐ฃ*๐
f=ฮป*v
where
๐ฃ is the speed of sound and
๐ is the wavelength.
Given:
๐ฃ = 343 m/s
๐ = 44 cm = 0.44 m
ฮป=44cm=0.44m
Plugging in the values:
๐ = 343 / 0.44 โ 779.55 Hz
The period of a wave is the reciprocal of the frequency:
๐ = 1/๐
T= 1/779.55Hz โ 0.00128s(or 1.28 ms)