A cat will make a hissing sound when it feels that it is in any form of danger. This sound is made to warn other animals or people off.
With ears
The sounds animals can hear is based on the frequency that the certain animal can hear. For example, dog's can hear at much higher frequencies then humans can, so if a sound is made that is above our capability of hearing, we will not hear the sound, but the dog will.
Sound with a frequency lower than about 20 cycles per second, called infrasonic sound. Sound with a frequency higher than about 20,000 cycles per second, called ultrasonic sound. Only those with excellent hearing can perceive sound at these extremes. As we age and as our hearing is damaged by exposure to loud sounds, the frequency range of hearing is reduced. Some animals can hear sounds above and below the range of humans.
Well fish don't really hear that good so there are now words fish can hear.
At a very close distance to the spider you hear the loudest sound.
singing
they can hear sound in ears
Sound perspective is the way you hear a sound. (Where you hear it coming from)
What unusual sound do they hear in the fire?
The loudest sound that we can hear is about 130 decibels.
"Hear" doesn't have an "a" sound at all; it has a long "e" sound.
When you're playing with a headset plugged in to your amp, those around you can hear the acoustic guitar itself, but not the sound coming out of the amp, as the headset cancels the sound from coming out the speaker.
There is no where for the sound wave to reflect
When a sound wave is reflected, you hear an echo.
This is a rather general question, but the reason for this is because the car is travelling slower then the speed of sound, and so the sound of the engine and the wheels against the surface travels faster then the car itself, hence why you will hear it before the actual entity reaches you.
you can hear by sound wave and ears
Sound is longitudinal waves that you can hear. http://en.wikipedia.org/wiki/Longitudinal_wave