Question

What is the sound intensity level in decibels of ultrasound of intensity 7.53 ✕ 104 W/m2, used to pulverize tissue during surgery?

Answer 1

Answer : The intensity of sound level in decibels is, 169 dB

Step-by-step explanation:

The expression used for the intensity of sound level is given by the equation:

`P=10* \log (I)/(I_o)`

where,

I = final intensity =
`7.53* 10^4W/m^2`

`I_o` = initial intensity = threshold intensity of human hearing =
`10^(-12)W/m^2`

Now put all the given values in the above formula, we get:

`P=10* \log (7.53* 10^4W/m^2)/(10^(-12)W/m^2)`

`P=168.767dB\approx 169dB`

Thus, the intensity of sound level in decibels is, 169 dB