intensity of a wave from point source is inversely proportional to (distance)2
Thus
At
r=10m
I=Io/102=10/100=0.1 W/m2
The intensity from a point source of waves at a distance of 1 m from the...
A source emits sound waves equally in all directions. The intensity of the waves 2.50 m from the source is 1.90 times 10^-4 W/m^2. Find the power of the source, If the diameter of your eardrum is 8.4 mm, how far from the source do you have to be located so that your ears combined receive 0.42 times 10^-12 J of energy each second?
Increasing your distance by a factor of 10 from a point source of spherical waves reduces the intensity level b by how many decibels?
An intensity detector can be moved along a straight track. a source of spherical waves is placed at one end of the track. When the detector is 2 m away from the source, it measures an intensity of 80 W/m2. What distance do we need to move the detector from that position to get a measurement 13 dB lower?
Sound waves at ultrasonic frequencies attenuate much faster than audible sound waves. The sound intensity level of a point source of ultrasonic sound waves is measured as 100 dB at a distance of 1.00 m from the source and 65 dB at 2.00 m. Assuming the waves spread in all directions, what is the attenuation coefficient alpha? [Answer in 1/m to within 5%]
Sound waves at ultrasonic frequencies attenuate much faster than audible sound waves. The sound intensity level of a point source of ultrasonic sound waves is measured as 100 dB at a distance of 1.00 m from the source and 65 dB at 2.00 m. Assuming the waves spread in all directions, what is the attenuation coefficient alpha? [Answer in 1/m to within 5%]
One source emits spherical waves and another emits plane waves. For which source does the intensity measured by a detector of fixed size fall off more rapidly with distance? Which statements are true? 1.) The intensity of the plane source falls off more rapidly. 2.) The measured intensity for the spherical source decreases as 1/r2. 3.) The measured intensity for the plane source decreases as 1/r. 4.) The measured intensity for the plane source does not decrease. 5.)The measured intensity...
A point source of sound generates a 200 Hz tone. The wave has an intensity of 2.2×10−8 W/m2 at a distance of 3 m from the source. Find the total sound power at the source. At what distance from the source is the decibel level below 15 dB? What is the intensity of the sound at this distance?
The intensity of sound radiated from a small source is measured at a point 50meters from the source and found to be 2.0u W/m^2. What will the intensity at a point that is 200m further from the source?
Spherical sound waves are emitted from a 2.00-W source. Assuming that the energy of the waves is conserved, what is the intensity at 0.60 m from the source? Submit Answer Tries 0/99 What is the intensity at 3.10 m from the source? Submit Answer Tries 0/99
Spherical sound waves are emitted from a 2.00-W source. Assuming that the energy of the waves is conserved, what is the intensity at 0.60 m from the source? Submit Answer Tries 0/99 What is the intensity at 3.10 m from the source? Submit Answer Tries 0/99