For Exercise, the formula L = 10 log (£) gives the loudness of sound L (in dB) based on the intensity of sound I (in W/m2). The value 10 = 10-12 W/m2 is the minimal threshold for hearing for midfrequency sounds. Hearing impairment is often measured according to the minimal sound level (in dB) detected by an individual for sounds at various frequencies. For one frequency, the table depicts the level of hearing impairment. Category Loudness (dB) Mild 26 sLs 40 Moderate 41 90 a. If the minimum intensity heard by an individual is 3.4 x 10-8 W/m2, determine if the individual has a hearing impairment. b. If the minimum loudness of sound detected by an individual is 30 dB, determine the corresponding intensity of sound.

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For Exercise, the formula L = 10 log (£) gives the loudness of sound L (in dB) based on the intensity of sound I (in
W/m2). The value 10 = 10-12 W/m2 is the minimal threshold for hearing for midfrequency sounds. Hearing impairment is
often measured according to the minimal sound level (in dB) detected by an individual for sounds at various frequencies.
For one frequency, the table depicts the level of hearing impairment.
Category
Loudness (dB)
Mild
26 sLs 40
Moderate
41 <Ls 55
Moderately severe
56 sLs 70
Severe
71sLs 90
Profound
L> 90
a. If the minimum intensity heard by an individual is 3.4 x 10-8 W/m2, determine if the individual has a hearing
impairment.
b. If the minimum loudness of sound detected by an individual is 30 dB, determine the corresponding intensity of sound.
Transcribed Image Text:For Exercise, the formula L = 10 log (£) gives the loudness of sound L (in dB) based on the intensity of sound I (in W/m2). The value 10 = 10-12 W/m2 is the minimal threshold for hearing for midfrequency sounds. Hearing impairment is often measured according to the minimal sound level (in dB) detected by an individual for sounds at various frequencies. For one frequency, the table depicts the level of hearing impairment. Category Loudness (dB) Mild 26 sLs 40 Moderate 41 <Ls 55 Moderately severe 56 sLs 70 Severe 71sLs 90 Profound L> 90 a. If the minimum intensity heard by an individual is 3.4 x 10-8 W/m2, determine if the individual has a hearing impairment. b. If the minimum loudness of sound detected by an individual is 30 dB, determine the corresponding intensity of sound.
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