How speakers make sounds of different volume and frequency

Loudspeakers will play loud when the cone vibrates a large amount, or soft when it moves a small amount. Why? Think about drums. Banging a drum skin really hard makes the skin vibrate a greater distance and produce a louder sound. In the same way, sending a bigger pulse of electricity into a loudspeaker makes the cone move further and generates a louder noise. Quieter sounds are made by smaller pulses of electricity.

We can reach the same conclusion by thinking about energy. The laws of physics tell us that we can't make energy out of thin air. So if we want to make a loud sound (one that carries lots of energy), we need to create a vibration with lots of energy in the first place (in other words, hit something really hard).

Some drums have pedals on them that make the skin tighter or looser. If the skin is tight, it vibrates more quickly when you bang the drum and produces a higher-pitched sound; if the skin is loose, the opposite happens and you get a much lower note. A similar thing happens in a loudspeaker. Bigger speakers with large cones (known as woofers) move more slowly than smaller speakers with smaller cones (known as tweeters)—so they are better for producing lower frequencies. Any speaker can produce a wide range of different sound frequencies by moving back and forth quickly (for higher notes) or slowly (for lower notes).

JWT rubber plastic co.,ltd has over 7 years experience in manufacturing rubber product and plastic injection products. Our cooperation brands inclouds the world top 500 companies, as for our operation skills, vulcanization 、spraying、laser etching、printing and so on, these consist of one complete professinal product manufacturing process. When you have the mold design needs, we also can supply the mold design and improvement service.