1. The fundamental frequency of a note played from an organ was 1000Hz with a sound...
For sound waves in air with frequency 1000 Hz a displacement amplitude of produces a pressure amplitude of . Use = 344 . a) What is the wavelength of these waves? b) For 1000-Hz waves in air, what displacement amplitude would be needed for the pressure amplitude to be at the pain threshold, which is 30 Pa? Express your answer using two significant figures. c) For what wavelength will waves with a displacement amplitude of produce a pressure amplitude of...
1. An experimenter wishes to generate in air a sound wave that has a displacement amplitude of 5.70 x 10-6 m. The pressure amplitude is to be limited to 0.850 Pa. What is the minimum wavelength the sound wave can have? (Take the equilibrium density of air to be p = 1.20 kg/m3 and assume the speed of sound in air is v = 343 m/s.) m 2. A sound wave in air has a pressure amplitude equal to 3.98...
A sound wave with a pitch of 261.6Hz (middle C) is played in a warm concert hall, where the air temperature is 25∘C. A passer-by in the cold winter street outside hears the note coming through a window. The air temperature outside is -5∘C. a.) What will be the frequency of the sound heard outside in the cold air? Give an answer accurate to one decimal point. (Hz) b.)What will be the wavelength of the sound wave in the warm...
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...
Organ pipe A with both ends open has a fundamental frequency of 320.0 Hz. The third harmonic of organ pipe B with one end open has the same frequency as the second harmonic of pipe A. Assume a speed of sound of 343 m/s. What is the length of Pipe A? What is the length of Pipe B?
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...
Two sound waves (call them X and Y) travel through the air. Wave X has a wavelength of 0.1 m and a pressure amplitude of 0.01 Pa. Wave Y has a frequency of 3430 Hz and a pressure amplitude of 1 Pa. a.) Which sound wave has a higher pitch? b.) Which sound wave is louder? Fill in the following: The intensity of Y is that of X by ____ times. Soundwave Y is dB soundwave X.
A closed (at one end) organ pipe has a fundamental frequency of 680 Hz. (a)What is the length of the pipe? (b)What is the wavelength of the fourth overtone?
S.a) What is the wavelength of a sound wave general fundamental frequency is 128 Hz and it travels with spo the tube? sound wave generated in a tube with two open ends whose d it travels with speed of sound v = 340 m/s? (b) What is the length of (a) = (b) L= = 340 m/s, 11 o. (a) What length should a tube closed at one end have on a day when the speed of sound its fundamental...
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...