Answer :
Ultrasound waves at intensities above 104 W/m² can do serious damage to living tissues, 104 W/m² corresponds to 160 dB, 170 dB is the sound intensity level, in decibels, of ultrasound with intensity 105 W/m²,
What is ultrasound waves?
An ultrasonic scan employs high-frequency sound waves to generate a picture of a person's interior body components. Ultrasound is frequently used by medical professionals to examine a growing foetus (unborn child), a person's abdominal and pelvic organs, muscles, tendons, heart, and blood vessels.
Given that,
Ultrasound waves at intensities above 10⁴ W/m² corresponds to 160 dB.
ultrasound with intensity 10⁵ W/m².
Sound intensity levels in dB is defined as:
β = 10 log [tex](\frac{I}{I_0})[/tex]
where [tex]I_0[/tex] is the reference intensity levels.
so, β₁ - β₂ = 10 log [tex](\frac{I_1}{I_0})[/tex] - 10 log [tex](\frac{I_2}{I_0})[/tex]
or, β₁ - β₂ = 10 log [tex](\frac{I_1}{I_2})[/tex]
or, β₁ = β₂ + 10 log [tex](\frac{I_1}{I_2})[/tex]
so, for β₂ = 160 dB, I₂ = 10⁴ W/m² , I₁ = 10⁵ W/m²
or, β₁ = β₂ + 10 log [tex](\frac{10^4}{10^5})[/tex]
or, β₁ = 160 + 10 log [tex](\frac{10^4}{10^5})[/tex]
or, β₁ = 170 dB.
Thus, the sound intensity level is: 170 dB.
To know more about ultrasound waves refer to:
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