2. Speakers A and B are vibrating out of phase. They are directly facing each other, are 6.60 m apart, and are each playing a 140 Hz tone. The speed of sound is 338 m/s. On the line between the speakers there are points where minimum sound intensity occurs. What is the distance of the nearest point from speaker A? 0.89 On fourth Attempt = 0.25 0.886 m 156 ac2156 ac2156 A L₁ 156 ac2156 CR156) L₂ B Show my other submissions -21502156 ac2156 6 ac2156 ac2156 acc ac2156 ac21
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- 8. Three friends x,y,z are standing in a line at equal distance of 1m. Person y is standing exactly in front of the speakers with a 3m distance from the center point of the speakers. The speakers are producing signals of same frequency and are 0.8 m apart. Signals of some frequencies are horrible for y and barely audible for x and z. Find the lowest frequencies creating this effect. Assuming velocity of sound as 340m/s3. Two identical loudspeakers are some distance apart. A person stands 5.20 m from one speaker and 3.80 m from the other. What is the fourth lowest frequency at which destructive interference will occur at this The speed of sound in air is 340 m/s. Hz 6 ceil cil6 ccil6 16 cci16 ccc9. Two speakers are facing each other and producing a single pure tone. You are standing between the two speakers. The loudness goes from a maximum, down to a minimum and back to a maximum as you move a distance of d = 3.5 m towards one of the speakers. What is the wavelength of the sound wave produced by the speakers?
- In each of the four scenarios shown in the images, a large bat lets out a short burst of ultrasonic sound, which a smaller bat hears a moment later. If the large bat flies at 2.320 m/s and the small bat flies at 13.80 m/s, order the frequencies that the smaller bat detects in the four scenarios from highest to lowest. Assume that the speed of sound is 343.0 m/s. Highest frequency A D B. A B C Lowest frequency Answer Bank In Scenario C, part of the large bat's signal reflects off the small bat and returns to the large bat, warning it of the smaller bat's presence. If the initial signal has a frequency of 66.70 kHz, what return frequency fr will the large bat detect? Calculate the final frequency to four significant figures. fr Incorrect kHz ᎠW S # JO E X 3 5. By how many decibels do you reduce the sound intensity level due to a source of sound if you quadruple your distance from it? Assume that the waves expand spherically. X 40 dB 4 C 25 868 R % 5 FS DEC V T tv 6 MacBook Air B F6 H & 7 F7 8 N انات 9 M K MOSISO zoom P CU command 1 option! 1 7. A violin string is tuned to 480 Hz (fundamental frequency). When playing the instrument, the violinist puts a finger down on the string one-fourth of the string length from the neck end. What is the frequency of the string when played like this? Q ← A 1 option 2 c N W S . # 3 3 X command Hz C E D ZEEL!! $ 4 C R F % 5 G Search or type URL V T G MacBook Pro 1332 11134 A 6 Y B & 7 H U N * 00 8 J - M → ( 9 K O < I H a ) O L 1332 jj13 command P .. - - : ; U { option [ + = ? 1 "1 F
- 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).18. A sound wave s(r, t) = sm Cos(ka – wt +o) travels at 343 m/s through air in a long horizontal tube. At one instant, air molecule A at r = 2.00 m is at its maximum positive displacement of 6.0 nm and air molecule B at r = a positive displacement of 1.5 nm. All the molecules between A and B arc at intermediate displacements. What is the 2.05 m is at frequency of the wave? (1) 1400 Hz (2) 1300 Hz (3) 1200 Hz (4) 1100 Hz (5) 1000 HzTwo speakers are a distance d = 19.95m apart and emitting in-phase sound of frequency f = 55Hz. The sound is traveling at a speed of v= 339.8m/s. If a person starts by standing at one of the speakers and walks towards the other one, what is the shortest distance they can walk to find a point in which they hear destructive interference? 6.5 m