A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 29.

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A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 29.7 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 3.10 10-11 W/m2. What is the intensity delivered to the eardrum?

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