dogs can hear higher pitches. it doesn't "mean" anything. it is normal. dogs have better hearing.
the object isn't vibrating in a range for humans to hear.
It can be thermal energy if it is the atoms vibrating in a solid material. If the vibration is large enough it can cause acoustic energy, if the vibrating object is coupled to the atmosphere. If an object is vibrating in a magnetic field it can give off electromagnetic energy.
Human ears can only hear (i.e., detect vibrations) in a range of about 20-20,000 vibrations per second. A pendulum will usually vibrate at much less than 20 vibrations per second. But please note that a vibrating object (such as a plucked string) may also produce secondary vibrations, other than the main frequency.On the other hand, a vibration must also be strong enough, in order to be heard.
when we use a pointed object it will hurt the eardrum and we cannot hear
they cant hear but they can hear vibrating so they seem to know that its its enimie
its the vibrating of mollecules. That's why in space, you cant hear anything because there are no mollecules to vibrate.
when we use a pointed object it will hurt the eardrum and we cannot hear
By ear because sound keep on vibrating until it reaches our ear
It's most likely to do with the type of walls which are in the house. If the walls are weak/thin, then you will be able to hear what is happening on the other side.
Sound waves travel via vibrating molecules in air or other materials (water for example). On the Moon there is no atmosphere and as such nothing for sound waves to travel in.
Sound waves travel via vibrating molecules in air or other materials (water for example). On the Moon there is no atmosphere and as such nothing for sound waves to travel in.
When an object vibrates, it forces the neighbouring particles of the medium to vibrate. These vibrating particles then force the particles adjacent to them to vibrate. In this way, vibrations produced by an object are transferred from one particle to another till it reaches the ear.