An extendible pipe is open at both ends. A speaker can be found a short distance from one end. The speed of sound in air is v = 336 m/s. Assume end effects can be neglected. Speaker Figure 1. A speaker is played through an extendable pipe that is open at both ends. Part 1) A note with a fixed frequency is played through the speaker. The length of the pipe is adjusted until the fundamental mode is found. This nappens when L = 18.4 cm. What is the fundamental frequency? fo = Hz Part 2) The pipe is extended until the next harmonic is heard. What will the length of the pipe be? L = ст

An extendible pipe is open at both ends. A speaker can be found a short distance from one end. The speed of sound in air is v = 336 m/s. Assume end effects can be neglected. Speaker Figure 1. A speaker is played through an extendable pipe that is open at both ends. Part 1) A note with a fixed frequency is played through the speaker. The length of the pipe is adjusted until the fundamental mode is found. This nappens when L = 18.4 cm. What is the fundamental frequency? fo = Hz Part 2) The pipe is extended until the next harmonic is heard. What will the length of the pipe be? L = ст

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter14: Sound

Section: Chapter Questions

Problem 18P: A trumpet creates a sound intensity level of 1.15 102 dB at a distance of 1.00 m. (a) What is the...

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A trumpet creates a sound intensity level of 1.15 102 dB at a distance of 1.00 m. (a) What is the sound intensity of a trumpet at this distance? (b) What is the sound intensity of five trumpets at this distance? (c) 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. (d) Calculate the decibel level of the five trumpets in the first row. (e) If the trumpets are being played in an outdoor auditorium, how far away, in theory, can their combined sound be heard? (f) In practice such a sound could not be heard once the listener was 2-3 km away. Why cant the sound be heard at the distance found in part (e)? Hint: In a very quiet room the ambient sound intensity level is about 30 dB.
A trumpet creates a sound intensity level of 1.15 102 dB at a distance of 1.00 m. (a) What is the sound intensity of a trumpet at this distance? (b) What is the sound intensity of five trumpets at this distance? (c) 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. (d) Calculate the decibel level of the five trumpets in the first row. (e) If the trumpets are being played in an outdoor auditorium, how far away, in theory, can their combined sound be heard? (f) In practice such a sound could not be heard once the listener was 2-3 km away. Why cant the sound be heard at the distance found in part (e)? Hint: In a very quiet room the ambient sound intensity level is about 30 dB.