Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Textbook Question
Chapter 12, Problem 30P
If you were to build a pipe organ with open-tube pipes spanning the range of human hearing (20 Hz to 20 kHz), what would be the range of the lengths of pipes required?
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The area of a typical eardrum is about 5.0 × 10–5m2 . Calculate the sound power (the energy per second) incident on an eardrum at (a) the threshold of hearing and (b) the threshold of pain.
The area of a typical eardrum is about 5.0x10−5 m2.
What is the sound power (energy per second) incident on the eardrum at the threshold of hearing?
What is the sound power (energy per second) incident on the eardrum at the threshold for pain?
The area of a typical eardrum is about 5.0 x 105 m2,
(a) Calculate the sound power (the energy per second) incident on an eardrum at the threshold of hearing.
(b) Calculate the sound power incident on an eardrum at the threshold of pain.
Chapter 12 Solutions
Physics: Principles with Applications
Ch. 12 - Prob. 1OQCh. 12 - Prob. 1QCh. 12 - Prob. 2QCh. 12 - Prob. 3QCh. 12 - When a sound wave passes from air into water, do...Ch. 12 - What evidence can you give that the speed of sound...Ch. 12 - Prob. 6QCh. 12 - How will the air temperature in a room affect the...Ch. 12 - Prob. 8QCh. 12 - Prob. 9Q
Ch. 12 - 10.A noisy truck approaches you from behind a...Ch. 12 - Prob. 11QCh. 12 - Prob. 12QCh. 12 - Traditional methods of protecting the hearing of...Ch. 12 - 14- Consider the two waves shown in Fig....Ch. 12 - Is there a Doppler shift if the source and...Ch. 12 - Prob. 16QCh. 12 - Prob. 17QCh. 12 - Prob. 1MCQCh. 12 - Prob. 2MCQCh. 12 - Prob. 3MCQCh. 12 - Prob. 4MCQCh. 12 - Prob. 5MCQCh. 12 - Prob. 6MCQCh. 12 - Prob. 7MCQCh. 12 - Prob. 8MCQCh. 12 - Prob. 9MCQCh. 12 - Prob. 10MCQCh. 12 - Prob. 11MCQCh. 12 - Prob. 12MCQCh. 12 - Prob. 13MCQCh. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - (a) Calculate the wavelengths in air at 20°C for...Ch. 12 - Prob. 4PCh. 12 - An ocean fishing boat is drifting just above a...Ch. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - What is the intensity of a sound at the pain level...Ch. 12 - What is the sound level of a sound whose intensity...Ch. 12 - Prob. 10PCh. 12 - Prob. 11PCh. 12 - Prob. 12PCh. 12 - One CD player is said to have a signal-to-noise...Ch. 12 - Prob. 14PCh. 12 - At a rock concert, a dB meter registered 130 dB...Ch. 12 - Prob. 16PCh. 12 - If the amplitude of a sound wave is made 3.5 times...Ch. 12 - Prob. 18PCh. 12 - Prob. 19PCh. 12 - Prob. 20PCh. 12 - Prob. 21PCh. 12 - Prob. 22PCh. 12 - Prob. 23PCh. 12 - Prob. 24PCh. 12 - Prob. 25PCh. 12 - Prob. 26PCh. 12 - The A string on a violin has a fundamental...Ch. 12 - Prob. 28PCh. 12 - (a) What resonant frequency would you expect from...Ch. 12 - If you were to build a pipe organ with open-tube...Ch. 12 - A tight guitar string has a frequency of 540 Hz as...Ch. 12 - Prob. 32PCh. 12 - 33. (II) An unfingered guitar string is 0.68 m...Ch. 12 - Prob. 34PCh. 12 - 35. (II) An organ is in tune at 22.0°C. By what...Ch. 12 - How far from the mouthpiece of the flute in...Ch. 12 - (a) At T= 22°C. how long must an open organ pipe...Ch. 12 - A particular organpipe can resonate at 264 Hz, 440...Ch. 12 - Prob. 39PCh. 12 - Prob. 40PCh. 12 - Prob. 41PCh. 12 - Prob. 42PCh. 12 - Prob. 43PCh. 12 - The human ear canal is approximately 2.5 cm long....Ch. 12 - Prob. 45PCh. 12 - Prob. 46PCh. 12 - A certain dog whistle operates at 23.5 kHz. while...Ch. 12 - Prob. 48PCh. 12 - A guitar string produces 3 beats/s when sounded...Ch. 12 - Prob. 50PCh. 12 - Prob. 51PCh. 12 - Prob. 52PCh. 12 - Prob. 53PCh. 12 - Prob. 54PCh. 12 - Prob. 55PCh. 12 - Prob. 56PCh. 12 - Prob. 57PCh. 12 - Prob. 58PCh. 12 - As a bat flies toward a wall at a speed of 6.0...Ch. 12 - Prob. 60PCh. 12 - Prob. 61PCh. 12 - Prob. 62PCh. 12 - Prob. 63PCh. 12 - Prob. 64PCh. 12 - Prob. 65PCh. 12 - Prob. 66PCh. 12 - Prob. 67PCh. 12 - Prob. 68PCh. 12 - Prob. 69PCh. 12 - Prob. 70PCh. 12 - Prob. 71GPCh. 12 - Prob. 72GPCh. 12 - Prob. 73GPCh. 12 - Prob. 74GPCh. 12 - Prob. 75GPCh. 12 - Prob. 76GPCh. 12 - Prob. 77GPCh. 12 - Prob. 78GPCh. 12 - Prob. 79GPCh. 12 - Prob. 80GPCh. 12 - Prob. 81GPCh. 12 - Prob. 82GPCh. 12 - Prob. 83GPCh. 12 - Prob. 84GPCh. 12 - Prob. 85GPCh. 12 - Prob. 86GPCh. 12 - Prob. 87GPCh. 12 - A bat flies toward a moth at speed 7.8 m/s while...Ch. 12 - Prob. 89GPCh. 12 - Two loudspeakers face each other at opposite ends...Ch. 12 - A sound-insulating door reduces the sound level by...Ch. 12 - Prob. 92GPCh. 12 - Prob. 93GPCh. 12 - Prob. 94GPCh. 12 - Prob. 95GPCh. 12 - Prob. 96GP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Some studies suggest that the upper frequency limit of hearing is determined by the diameter of the eardrum. The wavelength of the sound wave and the diameter of the eardrum are approximately equal at this upper limit. If the relationship holds exactly, what is the diameter of the eardrum of a person capable of hearing 20 000 Hz? (Assume a body temperature of 37.0C.)arrow_forwardA sound wave traveling in air has a pressure amplitude of 0.5 Pa. What is the intensity of the wave?arrow_forwardA pipe is observed to have a fundamental frequency of 345 Hz. Assume the pipe is filled with air (v = 343 m/s). What is the length of the pipe if the pipe is a. closed at one end and b. open at both ends?arrow_forward
- A sound wave in air has a pressure amplitude equal to 4.00 103 Pa. Calculate the displacement amplitude of the wave at a frequency of 10.0 kHz.arrow_forwardA piano tuner uses a 512-Hz tuning fork to tune a piano. He strikes the fork and hits a key on the piano and hears a beat frequency of 5 Hz. He tightens the string of the piano, and repeats the procedure. Once again he hears a beat frequency of 5 Hz. What happened?arrow_forwardWhat would be the length (in cm) of a closed - end organ pipe has a 7th harmonic resonance frequency of 1320 Hz? Assume a speed of sound in air of 344 m/s.arrow_forward
- An organ pipe that is open at both ends is 4.0 m long. What is its fundamental frequency?arrow_forwardSound is detected when a sound wave causes the tympanic membrane (the ear drum) to vibrate. Typically, the diameter of this membrane is about 8.4 mm in humans. A) how much energy is delivered to the eardrum each second when someone whispers (20 dB) into your ear? B) to comprehend how sensitive the ear is to very small amounts of energy, calculate how fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have this amount of kinetic energy.arrow_forward(a) Ear trumpets were never very common, but they did aid people with hearing losses by gathering sound over a large area and concentrating it on the smaller area of the eardrum. What decibel increase does an ear trumpet produce if its sound gathering area is 900 cm2 and the area of theeardrum is 0.500 cm2 , but the trumpet only has an efficiency of 5.00% in transmitting the sound to the eardrum?(b) Comment on the usefulness of the decibel increase found in part (a).arrow_forward
- Sound is detected when a sound wave causes the eardrum to vibrate (as shown). Typically, the diameter of the eardrum is about 8.4 mm in humans. When someone speaks to you in a normal tone of voice, the sound intensity at your ear is approximately 1.0 × 10-6 W/m2. How much energy is delivered to your eardrum each second?arrow_forwardFind the wavelength in air of an 22-Hz sound wave at 486 m/s, which is one of the lowest frequencies that are detectable by the human ear. No need to include the unit. Write your answer in whole numbers.arrow_forwardA sound of intensity I = 10-6 W/m2 falls on a detector of area A = 7 x 10-5 m2.(This is about the size of an eardrum.) The total power P being received by this detector = W.arrow_forward
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