An oscilllator of frequency 680 Hz drives two speakers. The speakers are fixed on a vertical pole at a distance 3m from each other as shown in the fig. A person whose height is almost the same as that of the lower speaker walks towards the lower speaker in a direction perpendicular to the pole. Assuming that these is no reflection of sound from the ground and speed of sound is v = 340 m/s. As the person walks toward the pole, the total number of times that the person hears a minimum in sound intensity will be:

An oscilllator of frequency 680 Hz drives two speakers. The speakers a

1.	An oscilllator of frequency 680 Hz drives two speakers. The speakers are fixed on a vertical pole at a distance 3m from each other as shown in the fig. A person whose height is almost the same as that of the lower speaker walks towards the lower speaker in a direction perpendicular to the pole. Assuming that these is no reflection of sound from the ground and speed of sound is v = 340 m/s. As the person walks toward the pole, the total number of times that the person hears a minimum in sound intensity will be:
Answer» 2 8 4 6 Answer :D

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