The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20∘C. At a distance of 4.90 m from the trumpet the sound intensity level is 49.0 dB . The frequency is 584 Hz .
Part A
What is the pressure amplitude at this distance?
Use 344 m/s for the speed of sound in air, 1.20 kg/m3 for the density of air, and 1.00×10−12 W/m2 for the reference intensity.
Part B
What is the displacement amplitude?
Use 1.42×105 Pa for the adiabatic bulk modulus of air.
Part C
At what distance is the sound intensity level 28.0 dB ?
The sound from a trumpet radiates uniformly in all directions in air with a temperature of...
The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20∘C. At a distance of 4.98 m from the trumpet the sound intensity level is 56.0 dB. The frequency is 586 Hz. Use 344 m/s for the speed of sound in air, 1.20 kg/m3 for the density of air, and 1.00×10−12 W/m2 for the reference intensity. a) What is the pressure amplitude at this distance? b) What is the displacement amplitude? Use 1.42×105 Pa...
Course Home <Ch 16 HW Problem 16.56 Part A The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20°C Al a distance of 4.92 m from the trumpet the sound intensity level is 470 dB. The frequency is 589 Hz Use 344 m/s for the speed of sound in air, 1.20 kg/m for the density of air, and 1.00x10-12 W/m for the reference intensity What is the pressure amplitude at this distance? Express...
A spherical source radiates sound uniformly in all directions. At a distance of 14 m, the sound intensity level is 90 dB. What power is radiated by this source?
A spherical source radiates sound uniformly in all directions. At a distance of 9 m, the sound intensity level is 100 dB. What power is radiated by this source?
Q2. A siren radiates sound uniformly in all directions. A person standing a distance L from the siren regsiters a sound intensity level of 115 dB but a person standing twice that distance registers an intensity of 109 dB. What is the ratio of the intensities at those points. What will the sound intensity level at a distance of 12 L be?
A power saw radiates sound uniformly in all directions and is measured at 103 dB 1.66 m from the saw. At what distance from the saw should you be so that the sound is at a safe level of 65.0 dB? Number Units (Anser must have 3 significant figures.)
A sound wave radiates from a source in all directions. If the power of the sound source is 200 watts, then the intensity level of the sound wave 1000 m from the source is (in dB)
A sound wave radiates from a source in all directions. If thepower of the sound source is 200 watts, then the intensity level ofthe sound wave 100m from the source is, in dB
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...
4. Consider a sound wave in the air that has displacement amplitude 0.0200 mm. Calculate the pressure amplitude for frequencies of (a) 150 Hz; (b) 1500 Hz; (c) 15 000 Hz . In air at normal atmospheric pressure and density, the speed of sound is 344 m/s and the bulk modulus is 1.42×10^5 Pa. Please show all work