You have a room that is 4 m long, 7 m wide, and has a ceiling height of 3 m. The floor is hardwood, a = .15 at 500 Hz. The walls are gypsum wallboard (GWB), a = .30 at 500 Hz. The ceiling is acoustic ceiling tile (ACT), a = .95 at 500 Hz. 1) What is the reverberation time in this room at 500 Hz?

In an acoustics lab you have a 60 m long pipe that contains very cold air, in fact T = – 46 °C.  Suppose that using a speaker you cause a sinusoidal wave of sound with wavelength 1.5 m to travel down the pipe, going from one end of the pipe to the other. ii) What is the frequency of the sound in the pipe? a) 1.5×102 Hz b) 2.0×102 Hz c) 2.5×102 Hz d) 3.0×102 Hz e) 3.5×102 Hz

Tornado Siren. The frequency of a tornado siren is 920 Hz. If a cyclist  is moving toward the siren at 10 m/s in 15 °C air, which has a speed of sound of 340 m/s, what is the frequency that the cyclist observes?

Two loudspeakers emit sound waves of the same frequency along the x-axis. The amplitude of each wave is a. The sound intensity is minimum where speaker 2 is 10cm behind speaker 1. The intensity increases as speaker 2 is moved forward and first reaches minimum, with amplitude 2a, when it is 30cm in front of speaker 1. a. what is the wavelength of the sound

An audio system is emitting a sound at a frequency of 676 Hz through two speakers separated by a distance d = 0.620 m. What's the shortest distance for a person to hear maximum intensity if he was facing the speaker on the right (see picture).

S A person stands 13.00 m from a speaker, and 8.00 m from an identical speaker. What is the wavelength of the first (n=1) interference maximum (constructive)? (Speed of sound = 343 m/s) (Unit = m) demy of Science. All Rights Reserved. =h H K hulu 20 Enter New ✔

A stretched string is 2.03 m long and has a mass of 20.3 g. When the string oscillates at 440 Hz, which is the frequency of the standard A pitch, transverse waves with a wavelength of 15.5 cm travel along the string. Calculate the tension T in the string. T = terms of use contact us help careers privacy polícy about us Show All Free-Fall-Phet.docx V VS T.jpeg free fall.png VS T.jpeg

A car moving at 20 m/s with its horn blowing (f = 1.2 kHz) is chasing another car going at 15 m/s. What is the apparent ffrequency of the horn as heard by the driver being chased? Take the speed of sound to be 340 m/s. A. 1331.25 kHz B. 1218.75 Khz C. 1083.33 kHz D. 1183.33 kHz