If the Intensity Level at Distance D of One Trombone

question 13

Multiple Choice

If the intensity level at distance d of one trombone is 70 dB,what is the intensity level of 76 identical trombones,all at distance d?

• A) 146 dB
• B) 89 dB
• C) 5320 dB
• D) 76 dB
• E) 82 dB