If a sound is increased from 60 dB to 80dB, by how much should the intensity of the sound increase? a. 10x b. 100x c. 1,000x d. 10,000x
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If a sound is increased from 60 dB to 80dB, by how much should the intensity of the sound increase?
a. 10x
b. 100x
c. 1,000x
d. 10,000x
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Solved in 2 steps
- A sound wave coming from a tuba has a wavelength of 1.10 m and travels to your ears at a speed of 253 m/s. What is the frequency of the sound you hear? a. 278 Hz b. 1/278 Hz c. 230 Hz d. 1/230 Hz e. 252 HzThe speed of sound in air is 330 m s-¹ 1. A motorcyclist travelling at a speed of 29 m s-¹ sounds the horn on their motorbike while passing a pedestrian beside the road. The rider hears the horn as a sound of frequency 250 Hz. a. What frequency does the pedestrian hear: i. when the motorcycle approaches? ii. when the motorcycle moves away? b. Explain why, when the motorcycle is right in front, the pedestrian hears the same frequency as the rider. DA guitar string is 0.9 m long with a mass of 0.0036 kg. The string is under 520 N of tension. a) What is the fundamental frequency of the string? b) What would be the fundamental frequency of the string it you doubled the tension?
- What is the dynamic range of human ear?a. threshold of hearing (W/m2)b. threshold of pain (W/m2)c. SIL of threshold of hearing(dB)d. SIL of threshold of pain(dB)e. Sound intensity level of 200 dB8. When you are 5.00 meters from a point source of sound waves you detect an intensity level, B, of 117 dB. The power output of the source is: a. What is the intensity level, ß, that you will detect if you moved to a location that is 10.0 meters from the source? Note your answer should be in dB. b. What is the power output of the source (in Watts)?A large iron wrecking ball swings from a crane back and forth once every 40.0seconds. What is the frequency?a. 0.025 Hzb. 0.05 Hzc. 0.25 Hzd. 0.40 Hz