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Yes, As people grow older their ability to hear very high pitched sounds (such as bats and silent dog whistles) drops off. This is partly due to aging deterioration and partly due to the fact that the structures in the ear that detect the sound get bigger and thicker.
Thus it is possible to build a sonic alarm which emits a loud sound at a pitch that only children (and some lucky adults with good hearing), dogs and cats can hear.
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Will your kids see santa because mine want to?
Possibly, possibly not. Santa can only be seen by the true believers, and can only be heard by the true believers. It is very rare when a kid gets to see Santa, or even hear him, but there is a strong possibility that your kids won't see Santa.
Its true t.i has 5 kids?
yes he has five kids and hes only 28!
Is it true that the federal court can only hear appeals cases from the states courts?
No.
300zx factory alarm?
True! 28, but not on thursdays
Can you hear with only brain stem activity?
You do know if this is true. You can not interpret the things without the involvement of cerebral cortex.
Is it true that dogs can hear better than humans?
Yes, it's true. They can hear noises from a mile away.
Is it true to state that female only are responsible for down syndrome?
no and waverer some kids have down syndrome
Are Satellite building are totally evacuated when the fire alarm rings?
true
Is it true Jay-Z can't have kids?
true
Is it true that you can hear sound best if its in water?
No
Is a Owlman real?
If what I hear is true, probably not.
Is it true that square is a triangle?
No and how did ya hear that?
