A sound wave a frequency of 20 kHz emerges through a circular opening that has a...
A sound wave with a frequency of 12.6 kHz emerges through a circular opening that has a diameter of 0.217 m. Find the diffraction angle θ when the sound travels (a) in air and (b) in water. (Note: The speed of sound in air is 343 m/s and the speed of sound in water is 1482 m/s.)
A sound wave with a frequency of 12.1 kHz emerges through a circular opening that has a diameter of 0.212 m. Find the diffraction angle θ when the sound travels (a) in air and (b) in water. (Note: The speed of sound in air is 343 m/s and the speed of sound in water is 1482 m/s.)
A sound wave in a solid has a frequency of 45.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air? (The speed of sound in air is 344 m/s.) speed of sound in solid m/s speed of sound in solid speed of sound in air
High-frequency sound waves exhibit less diffraction than low-frequency sound waves do. However, even high frequency sound waves exhibit much more diffraction under normal circumstances than do light waves that pass through the same opening. The highest frequency that a healthy ear can typically hear is 2.0 × 104 Hz. Assume that a sound wave with this frequency travels at 342 m/s and passes through a doorway that has a width of 1.2 m. (a) Determine the angle that locates the...
8. A sound wave propagates in air at 27°C with frequency 4.00 kHz. It passes through a region where the temperature gradually changes and then moves through air at 0°C. Give numerical answers to the fol- lowing questions to the extent possible and state your reasoning about what happens to the wave physically. (a) What happens to the speed of the wave? (b) What happens to its frequency? (c) What happens to its wavelength? Figure P17.7
10. A sound is transmitted through air (density 1.20 kg/m2) at a velocity of 345 m/s and then through water (density 1.00 x 10 kg/m2) at a velocity of 1495 m/s. Calculate the acoustic impedance in each medium. What fraction of the sound's intensity will be reflected and transmitted in passing from air to water? What fractions would be reflected and transmitted if the sound traveled from water to air?
3 questions plzzzzz QUESTION 32 Calculate the frequency of a 2 meter long sound wave as it travels through the air at a speed of 330 m/s. (do not type the units in your answer). QUESTION 33 A wave with a frequency of 5000 Hz is sent into the body and a signal is received back with a frequency of 4910Hz. What is the Doppler shift? (do not type the units) QUESTION 34 A sound wave is ringing at 6...
4. Your ears detect a sound wave with a frequency of 315 Hz and a sound intensity level of 80 dB. It originated in a vibrating string with a length of 1.9 meters. A) Waves can be longitudinal or transverse. What is the difference between these two kinds of waves? B) This question has one longitudinal wave and one transverse wave. Identify them. C) Recall that the sound you hear from a string is the fundamental frequency, which has a...
Sound emerges through a doorway, as in the figure. The width of the doorway is 76 cm, and the speed of sound is 343 m/s. Find the diffraction angle ? when the frequency is each of the following. (a) 5.8 kHz _______° (b) 5.8 ? 102 Hz _______° Room Vibrating air molecule located in the doorway
1. When a sound wave passes through air, and we hear it, the air pressure where we are varies with time. the excess pressure above (and below) atmospheric pressure in a sound wave is given by the graph below: p(t) t in seconds -1 (a) Show that the fundamental (n ) is 15 times smaller in amplitude compared to the second harmonic (n-2). Hint: Expand p() in a Fourier series to show this. It would be interesting to note that...