Sound intensity, B. in decibels (d B) is defined as B = 10 log(), where I is the intensity of the soundmeasured in watts per square metre (") and Io is 10-12 W, the threshold of hearing.Tracey decided that she needed a new vehicle, as her old one was beginning to run poorly and makeextremely loud noises while the engine ran. When she got her new vehicle, she measured the relativesound intensities of the vehicles running and found that her old vehicle was 23 times as intense as thesound of her new vehicle.If the decibel level of her new car is 79 d B, what is the decibel level of the old car?Show your full solution method on your work sheet. In the answer field, express your answer to thenearest decibel.Answer:

Intensity of sound is defined as power per unit area transported by wave. Power is defined as energy…

Answered: Sound intensity, B, in decibels (d B)…

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