Now, instead of tossing a pebble, visualize yourself setting up a large, medieval-style trebuchet on the shore and tossing a Volkswagen into the middle of the pond (visualize removing the battery first, and draining all the gasoline, oil, and brake fluid-we don't want to visualize poisoning the fish). If you put your finger into the water as the ripples from the pebble arrive at the bank, you'll barely feel them. The bigger a wave is, the more force it exerts on whatever it hits. The size of a wave is called its amplitude. In the world of sound, frequency corresponds with pitch we perceive a high frequency sound as having a high pitch, and a low frequency sound as having a low pitch.Īnother thing you'll notice is that the waves are fairly small. The number of waves that hit a fixed point (like the bank) within a given time period is called the frequency. One of the things you might notice is that the distance between the waves is pretty regular, and that they're all traveling at the same speed, so the time from the arrival of one wave on the bank where you're standing to the arrival of the next is fairly predictable. You toss a pebble into the middle of the pond and watch the waves ripple outward from the place the pebble strikes the surface. You are standing on the bank of a calm pond. The human auditory system is well-adapted to detect sound waves in air, but to understand how sound waves work, it may be helpful to think of wave action in water, since that's something most of us have had a chance to watch with our eyes.
If you want to be an audiologist, then instead of reading my web site, you need to enroll in a graduate program in audiology. Unless you want to be an audiologist, that is. There's a lot more to it than I'm presenting here, but this should be enough for you to understand what you need to know about the decibel scale in relation to hearing loss. It's a logarithmic scale, so it's a little tricky to understand sometimes. The decibel scale is what we use to measure how loud a sound is.
0 kommentar(er)
