Consider the below Threshold of hearing. Which of the following statement is incorrect?

b$8$

Select one:

a$.$ Frequencies below $20Hz$ and above $20KHz$ cannot be heard.

$o$.$ Two tones of equal power and different frequencies will not be equa

c$.$ Sensitivity decreases at low and high frequencies.

d$.$ A tone with $10dB$ amplitude and $12KHz$ frequency can be heard.

Clear mychoice