When two loudspeakers are played simultaneously at a place, then the listener sitting at a particular place cannot hear their sound, the reason for this is

When two loudspeakers are played simultaneously and a listener sitting at a particular place cannot hear their sound, the reason is interference (Option B). This occurs due to the phenomenon known as destructive interference. When sound waves from the two loudspeakers meet at a point where they are out of phase, meaning the crest of one wave coincides with the trough of another, they effectively cancel each other out. This results in a reduction or complete elimination of sound at that specific location. Destructive interference happens because sound waves are coherent and can add together or subtract from one another depending on their phase relationship. At points of destructive interference, the sound intensity drops significantly, creating zones of silence or reduced sound that the listener experiences. This principle of interference is key in understanding various acoustic phenomena and is widely studied in the field of wave mechanics.