Multiple Choice
The fundamental frequency of your closed organ pipe is 200 Hz. The second overtone of this pipe has the same frequency as the 3rd harmonic of an open pipe. What is the length of this open pipe?
18. Waves & Sound
Standing Sound Waves
Back18. Waves & Sound
Standing Sound Waves
- Open QuestionStanding sound waves are produced in a pipe that is 1.20 m long. For the fundamental and first two overtones, determine the locations along the pipe (measured from the left end) of the displacement nodes and the pressure nodes if (b) the pipe is closed at the left end and open at the right end.
- Open QuestionStanding sound waves are produced in a pipe that is 1.20 m long. For the fundamental and first two overtones, determine the locations along the pipe (measured from the left end) of the displacement nodes and the pressure nodes if (a) the pipe is open at both ends
- Open QuestionThe fundamental frequency of a pipe that is open at both ends is 524 Hz. (c) the frequency of the new fundamental.
- Open QuestionThe fundamental frequency of a pipe that is open at both ends is 524 Hz. If one end is now closed, find (b) the wavelength
- Open QuestionThe fundamental frequency of a pipe that is open at both ends is 524 Hz. (a) How long is this pipe? If one end is now closed
- Open Question(b) A metal bar with a length of 1.50 m has density 6400 kg/m3 . Longitudinal sound waves take 3.90 * 10-4 s to travel from one end of the bar to the other. What is Young's modulus for this metal?
- Open QuestionA loud factory machine produces sound having a displacement amplitude of 1.00 mm, but the frequency of this sound can be adjusted. In order to prevent ear damage to the workers, the maximum pressure amplitude of the sound waves is limited to 10.0 Pa. Under the conditions of this factory, the bulk modulus of air is 1.42 * 105 Pa. What is the highest-frequency sound to which this machine can be adjusted without exceeding the prescribed limit? Is this frequency audible to the workers?
- Open QuestionExample 16.1 (Section 16.1) showed that for sound waves in air with frequency 1000 Hz, a displacement amplitude of 1.2 * 10-8 m produces a pressure amplitude of 3.0 * 10-2 Pa. (a) What is the wavelength of these waves?
- Open Question
(II) A meteorite traveling 9400 m/s strikes the ocean. Determine the shock wave angle it produces
(b) in the water just after entering. Assume T = 20 °C.
- Open Question
(II) A tight guitar string has a frequency of 540 Hz as its third harmonic. What will be its fundamental frequency if it is fingered at a length of only 70% of its original length?
- Open Question
(II) A pipe in air at 21.5°C is to be designed to produce two successive harmonics at 308 Hz and 352 Hz. How long must the pipe be, and is it open or closed?
- Open Question
(II) A uniform narrow tube 1.50 m long is open at both ends. It resonates at two successive harmonics of frequencies 275 Hz and 330 Hz. What is
(a) the fundamental frequency, and
- Open Question
(II) An unfingered guitar string is 0.68 m long and is tuned to play E above middle C (330 Hz).
(b) What is the wavelength on the string of this 440-Hz wave?
- Open Question
(II) An unfingered guitar string is 0.68 m long and is tuned to play E above middle C (330 Hz).
(c) What are the frequency and wavelength of the sound wave produced in air at 22°C by this fingered string?