Question: In Exercise 17.5, how many clarinets must play at the same time in order to increase the intensity level from (70 mathrm{~dB}) to (80 mathrm{~dB})

In Exercise 17.5, how many clarinets must play at the same time in order to increase the intensity level from $70 \mathrm{~dB}$ to $80 \mathrm{~dB}$ ?

Exercises 17.5

A clarinet can produce sound waves of intensity level about $70 \mathrm{~dB}$. By how much does the intensity level increase if a second clarinet is played at the same time?

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