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1. A trumpeter plays at a sound level of 75 dB. Three equally loud trumpet players join in. What is the new sound level?(ans: 81 dB) 2. The sound level measured 30 m from a jet plane is 140 dB. What is the sound level at 300 m? (Ignore reflections from the ground) (ans: 120 dB)

1. A trumpeter plays at a sound level of 75 dB. Three equally loud trumpet players join in. What is the new sound level?(ans: 81 dB) 2. The sound level measured 30 m from a jet plane is 140 dB. What is the sound level at 300 m? (Ignore reflections from the ground) (ans: 120 dB)

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1. A trumpeter plays at a sound level of 75 dB. Three equally loud trumpet players join in. What is the new sound level?(ans: 81 dB) 2. The sound level measured 30 m from a jet plane is 140 dB. What is the sound level at 300 m? (Ignore reflections from the ground) (ans: 120 dB)
Transcribed Image Text:1. A trumpeter plays at a sound level of 75 dB. Three equally loud trumpet players join in. What is the new sound level?(ans: 81 dB) 2. The sound level measured 30 m from a jet plane is 140 dB. What is the sound level at 300 m? (Ignore reflections from the ground) (ans: 120 dB)
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