Question

A radio playing at a decibel level of 61.0dB is placed on top of a television playing at a decibel level of 65.0dB. a) What is the combined decibel level of both the television and the radio, in decibels? b) If the combined decibel level for the radio and television occurs when we are 2.00m from them how far away, in meters, would we need to be for the combined decibel level to be 55.0dB? Assume that the sounds waves from the radio and television expand out as a spherical waves.

Name: a radio playing at a decibel level of 610db is placed on top of a television playing at a decibel level of 650db a what is the combined decibel level of both the television and the radio in 64486
Uploaded: 2020-06-10T20:53:25-08:00
Duration: 4 min 25 s
Channel: Patrick Connors
Description: a radio playing at a decibel level of 610db is placed on top of a television playing at a decibel level of 650db a what is the combined decibel level of both the television and the radio in 64486

          A radio playing at a decibel level of 61.0dB is placed on top of a television playing at a decibel level of 65.0dB. a) What is the combined decibel level of both the television and the radio, in decibels? b) If the combined decibel level for the radio and television occurs when we are 2.00m from them how far away, in meters, would we need to be for the combined decibel level to be 55.0dB? Assume that the sounds waves from the radio and television expand out as a spherical waves.

Added by Victoria H.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Patrick Connors

06/10/2020

Step 1

L1 = 61.0 dB, L2 = 65.0 dB. 10^(61/10) = 10^6.1 ≈ 1.259×10^6 10^(65/10) = 10^6.5 ≈ 3.162×10^6 Sum ≈ 4.421×10^6 L_combined ≈ 10 log10(4.421×10^6) ≈ 66.45 dB Answer for (a): approximately 66.4 dB. Show more…

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A radio playing at a decibel level of 61.0dB is placed on top of a television playing at a decibel level of 65.0dB. a) What is the combined decibel level of both the television and the radio, in decibels? b) If the combined decibel level for the radio and television occurs when we are 2.00m from them how far away, in meters, would we need to be for the combined decibel level to be 55.0dB? Assume that the sounds waves from the radio and television expand out as a spherical waves.