根据“Elephants, for example, talk with each other using infra-sound(次声), which cannot be heard by human ears. Coral (珊瑚) in the ocean also sends sound waves to lead baby coral to safer areas to grow...Scientists have placed machines into these environments to pick up the sounds ...
What waves cause back and forth motion? What determines the frequency of a complex wave? How do pressure waves create sound? What type of wave makes up sound? What are waves produced by? What breaks surface waves? How are sound waves reflected? What distinguishes electromagnetic waves from oth...
These natural waveguides occur when the Sun is rising or setting, which makes sunrise and sunset good times to pick up VLF emissions. 当日出或日落的时候,这些波导就会产生,这样日出日落时就成了接收VLF排放的好时机。 Now, there are a few different sounds that you can hear on a VLF receiver, ...
Sound is a vibration that propagates across space. The illusion of this space can be created by stereo equipment that makes the sound from a set of speakers feel more encompassing, and less like it’s coming from a single direction. Instrument separation.The space between sounds in a ...
2. To be practical or advisable: It makes sense to go now. make something of To start a fight or quarrel over. make the grade To measure up to a given standard. make the most of To use to the greatest advantage. make the scene Slang 1. To put in an appearance: made the scene...
It’s unexpected and makes you feel like, “That’s not me.”To get over your hatred of your own voice, try listening to recordings of it. The more you get used to that, the more you know “That really is my sound.” If you think your voice is truly annoying, you can learn to...
Ok so now that you’ve got these terms down, let’s get into what makes up an STC rating, and why it’s a useful number... but also one you should be careful using. Pitfalls to Watch for with an STC Rating So let’s start with what an STC rating *is not*. STC does not ...
What type of wave makes up sound? How are longitudinal waves formed? How are transverse waves produced? What are the characteristics of light waves? Where do the waves from the electromagnetic spectrum come from? What are the different types of surface waves?
Put down your hands.Ask your friend to play the piano.Can you hear the sound of the piano?Cover your ears again.What can you find now?Yes!Our ears help to"catch"the sound to make us hear something. ②You know that sound makes air vibrate(震动),and then it make...
like a metal conductor, that's used to guide and direct waves.But waveguides also occur naturally—they make a path for radio waves to follow in our atmosphere.These natural waveguides occur when the Sun is rising or setting, which makes sunrise and sunset good times to pick up VLF emissio...