The sound level of a chinchilla's squeak as heard by a dog 6.60 m away is...
The sound level at a distance 3.00 m away from a source is 120 dB. At what distance will the sound level decrease to 100 dB?
At a distance of 73 cm, a mosquito can barely be heard at a sound level of 4.1 dB. What is the intensity of this sound? If the same mosquito were flying at a distance of 1.3 cm from your ear, what would be the intensity of its sound? If there were two mosquitoes 1.3 cm from your ear, how loud would they sound? (dB). How loud would the mosquito sound at 1.3 cm from your ear (dB)? Hint: sound...
A.Determine the sound level heard by the guitarist when one speaker is operating .Units dB B.Determine the sound level heard by the guitanist when both speakers are operating .Units dB A. The frequency of the signal as determined by the motor vehicle .Units MHz B.The frequency determined by the radar speed gun for the signal reflected back to it by the motor vehicle .Units :Hz Two identical speakers are positioned the same distagce from a guitarist. The intensity of sound...
3. A trumpet creates a sound intensity level of 1.15*102 dB at a distance of 1.00 m. I. What is the sound intensity of a trumpet at this distance? II. What is the sound intensity of five trumpets at this distance? III. Find the sound intensity of five trumpets at the location of the first row of an audience, 8.00 m away, assuming, for simplicity, the sound energy propagates uniformly in all directions. IV. Calculate the decibel level of the...
A city police siren radiates sound intensity of 3.34W/m2 which can be heard at an exact distance of 498 m away. At what sound intensity level can it be heard 69.5 m away from the siren? Answer:
A city police siren radiates sound intensity of 3.54W/m2 which can be heard at an exact distance of 455 m away. At what sound intensity level can it be heard 77.3 m away from the siren? Answer:
phons 100 9 80 60 A 40 20 20 10k 1000 100 10 Frequency Hz) a) At approximately what frequency is the human ear most sensitive? How can you tell? b) If you heard a 300-Hz tone with a sound level of 60 dB, approximately how many phons would you perceive? toward you with a speed v, starting a distance of 1 km away att 0. If the train moves very slowly (that is, v is extremely small compared to...
1)The sound level at a distance of 1.82 m from a source is 146 dB. At what distance will the sound level be 50.7 dB? Answer in units of m. 2)At what distance will the sound level be 7.22 dB? Answer in units of m.
if you are sitting 8.20 m from a 70.0 W speaker, what is the sound level in dB?
A trumpet creates a sound intensity level of 52.1 dB at a distance of 3.6 m. What is the sound intensity level (in dB) of 7 such trumpets at a distance of 10.9 m?