subject
Physics, 28.06.2019 03:10 wcraig1998

Interference of sound waves
two identical speakers are found at points (-x0, 0), (+x0, 0). they have the same phase and emit sinus waves with same amplitude a0 . (sound speed; v = 340 m/s)
a) what's the wavelength ? and wavenumber k of the oscillations when the speakers' frequency f is 1.1 khz?
b) how to both signals overlap along the connecting line between the speakers? consider both signals to be plane waves and write the result as a product of a location and a time dependent component. at which point is no signal heard?
note: cos(a) + cos(b) = 2 cos ((a+b)/2)*cos((a-b)/2)
c) now you place a microphone at (xm, 0). the excitation frequency of the speakers the excitation frequency of the speakers
is tuned from 20 hz to 20 khz. what are the 3 lowest frequencies that produce destructive interference at the location of the microphone? use x0 = 15m, xm = 5m .

ansver
Answers: 3

Other questions on the subject: Physics

image
Physics, 21.06.2019 16:10, mikisims
Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.
Answers: 3
image
Physics, 21.06.2019 22:30, ayoismeisjjjjuan
An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)
Answers: 1
image
Physics, 22.06.2019 07:20, swkgp3cevk
What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.
Answers: 3
image
Physics, 22.06.2019 19:30, bri1334
Listed below are the measured radiation absorption rates (in w/kg) corresponding to 11 cell phones. use the given data to construct a boxplot and identify the 5-number summary. 1.16 0.85 0.69 0.75 0.95 0.93 1.18 1.17 1.42 0.54 0.57 the 5-number summary is nothing, nothing, nothing, nothing, and nothing, all in w/kg. (use ascending order. type integers or decimals. do not round.)
Answers: 3
You know the right answer?
Interference of sound waves
two identical speakers are found at points (-x0, 0), (+x0, 0). the...

Questions in other subjects: