![]() Note: For a beat formation, we must travel in the same direction, and lie in the same phase. Similarly, when more sound waves hit the air molecules, we hear the beats. So, this variation in the loudness and softness is a beat. When the two waves overlap, we hear a loud sound, and when they do not overlap, we hear a soft sound. Now, on overlapping or interfering these two waves, we can see the frequency difference in the following graph: ![]() Now, if we take another speaker S2 and superimpose it on S1, then the graph so formed will be: Now, we’ll plot the graph to demonstrate how the displacement of the air varies with the passing time. A1 on getting hit with sound oscillates about its mean position. Let’s focus on a single air molecule (A1). Now, what happens here is, the sound coming out of it strikes with the air molecules. The sound coming out of a speaker S1 looks like this: If you’re a science buddy, you might wonder what a beat is and how it looks. Now, let’s say, your friend invited you to his concert, and you hear the pleasant sound of a tuning fork from the loudspeaker. In this article, you will get the best explanation of this concept that will remain in your mind forever. The concept of beat becomes hard to understand because when we can’t see waves, how would we determine a beat’s frequency or its phase difference? These superimposed waves (having slight variation in their frequencies) have an alternating loudness and softness this fluctuation is a beat. When you play the piano, the sound you hear by striking black and white keys of your keyboard is the interference of two sound waves. ![]() We all like to hear the melody of the piano and tuning fork.
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