1) As you are waiting at the Willard airport for a friend coming from Chicago, s

Question

1) As you are waiting at the Willard airport for a friend coming from Chicago, suddenly something goes wrong with the loudspeakers, and they start making a low pitch hum. You realized that you are standing exactly in the middle between the two loudspeakers on the opposite walls. Since the sound from both loudspeakers has the same intensity, you are standing in the interference maximum As you move toward one of the loudspeakers, the intensity decreases. When you have moved by 0.5 m , you hit the first point of zero intensity. Assuming that the speed of sound is v = 330 m/s , what is the frequency f of the sound in Hz ? f =

Explanation / Answer

The two speakers create a standing wave with the same wavelength as the sound of the two speakers. (See source) Given the distance between the interference maximum and the minimum of the wave is 0.5m, we are able to determine that the wavelength (?) of the sound is 4 x 0.5m = 2m. (Due to the oscillating nature of the standing wave, the wavelength is twice the distance between two maximums) f = v/? = 330m/s / 2m = 165 s^-1 = 165 Hz

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.