A spherical source is radiating sound waves with a potency of 55.0 watts. A) At what...
SOUND WAVES 12. Observer 2 is three times as far from a point (spherical) source of sound as is observer 1. The ratio I2/I1 of the intensities (observer 2 intensity to observer 1 intensity) of the sound detected by the observers is a) 9 b) 1/9 c) 1/3 d) 3 13. Which of the following frequencies would correspond to a sound with an ultrasonic frequency? a) 100Hz b) 1000Hz c) 10000Hz d) 100000Hz
A point source emits sound waves with a power output of 100 watts. What is the sound level (in dB) at a distance of 10 m? 16-5
Increasing your distance by a factor of 10 from a point source of spherical waves reduces the intensity level b by how many decibels?
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
5. By how many decibels do you reduce the sound intensity level due to a source of sound if you double your distance from it? Assume that the waves expand spherically. dB 6. The sound in a classroom is 63000 times as intense as the minimum threshold of hearing. What is the intensity level of this sound in decibels? dB
An outside loudspeaker (considered a small source) emits sound waves with a power output of 111 w (a) Find the intensity 10.7 m from the source W/m2 (b) Find the intensity level in decibels at that distance. dB (c) At what distance would you experience the sound at the threshold of pain, 120 dB? Need Help? Read 11. -/2 points SerCP10 14 P023 My No A commuter train passes a passenger platform at a constant speed of 42.1 m/s. The...
Question 8 Consider a source emitting sound at frequency f. The speed of sound wave in the medium is v. (a) Show that the Doppler frequency is for a stationary observer as the source approaches at speed v 12 marks (b) Show that the Doppler frequency is f for a stationary observer as the source recedes at speed v, [2 marks (c) Show that the Doppler frequency is vv as the observer and the source are travelling towards each other...
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...
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%]