The level of sound D in decibels is defined as follows: D = 10 log (10 16 ) 10-16 where I is the sound intensity in watts per centimeters squared. Determine the level in decibels of a sound with intensity I = 10-8 watts cm2
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- 2 Q:A- Calculate the sound level in dB of a sound intensity 10-8 Wm-The loudness, L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, dd, from the source of the sound.A person 14 feet from a jetski, it is 75 decibels loud.How loud is the jetski when the person is 46 feet away? Round your answer to the nearest hundredth.The intensity level in decibels is defined as 10 log10(I/I0), where I0 is a reference intensity equal to the human threshold of hearing, 10–12 W/m2. What is the intensity of the threshold of pain, 120 decibels? answer is : 10° W/m2 I'm not sure how they got this answer
- A sound wave traveling in 22 °C air has a sound intensity of 25 × 10-3 W/m2 Part (a) Assuming the density of air at this temperature is 1.19 kg/m3, what is the pressure variation of this sound wave in N/m2? Part (b) Calculate the sound intensity level in decibels.You hear a sound of (5.6x10^1) decibels. What is the intensity? Give your answer in microwatts/m2 to 2 sf. Assume the threshold of human hearing is 1.0x10-12 W/m². Use two significant figures for your answer. Note: 1 µW = 1×106 W Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: х10 AnswerA sound has an of intensity 2.0*10-4 W/m2 and has a sound level of 83.0 dB. If you double the intenisty how much does the sound level go up? 0.5 dB 1.0 dB 1.5 dB 2.0 dB 2.5 dB 3.0 dB 3.5 dB
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