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Because as you get older, your ability to hear high pitches becomes worse. In theory, a child should be able to hear a maximum high pitch of 20,000Hz. This, however is only if the child's hearing is perfect. Animals of different kinds can hear different frequencies, usually a lot higher than a child or human of any age. When you are about 18, you can still hear a pretty high sound (unless your hearing isn't good), but from the second you are born, your hearing is all down hill...
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Why are sonograms made with ultrasound waves instead of audible waves?
The higher the frequency the shorter the wavelength, so by the physics of sound waves, the smaller the objects that can reflect the sound back. Hence using ultrasound, with its very short wavelengths, the better the definition attainable.
Any sound with a frequency above the range humans can hear is called?
There is no such thing as a "frequency above hertz". Whatever the frequency, it will always be measured in Hertz.There is no such thing as a "frequency above hertz". Whatever the frequency, it will always be measured in Hertz.There is no such thing as a "frequency above hertz". Whatever the frequency, it will always be measured in Hertz.There is no such thing as a "frequency above hertz". Whatever the frequency, it will always be measured in Hertz.
What might you see hear or smell at a marina?
fish and smell salt and hear the waves clashing together
Why can't we hear when we have a lot of ear wax?
Because in order for us to hear, sound waves need to reach the eardrum - which vibrates - creating the sounds. Excessive earwax blocks the sound-waves reaching the eardrum, which reduces the volume of sounds.
Why does the ear pick up sound waves instead of light waves?
The two are different because Sound waves are longitudinal mechanical waves, but light waves are transverse electromagnetic waves, and sound requires a medium through which to travel, but light doesn't. Basically, Sound waves move sort of differently than Light waves.
What can a kid's brain do that an adult's can't?
Squat. Adults sit, or bend over...but they don't squat. Children can hear high frequency sounds that adults cannot. Most adults cannot hear tones above 13,000 Hz
What is determined by sound waves frequency?
The sound that you hear.
Why can't adults hear high frequency ring tones?
Bacause they can't
The change in frequency of sound waves in the Doppler effect is hear as a change in what?
A change in pitch.
When rf signals move around an object in their paths what is the phenomenon called?
By "rf signals", the question is referring to "radio frequency waves", "radio waves", or "waves" in general. This phenomenon, unique to waves, is called diffraction. Higher frequency waves diffract less than lower frequency waves. This is why you hear the bass through walls or cars when you can't hear the treble. This also happens with waves of any kind, such as liquids. AM frequency radio is generally better for cities with big buildings because the waves have a lower intensity, and therefore can "warp around" the buildings. FM frequency radio does not "wrap around" as well.
Does a signal generator generate sound waves?
It depends on the frequency range of the signal generator. Obviously, you won't hear radio waves.
Why can't adults hear high frequency ring-tones?
because their ears are more developed.
What are waves with low frequency?
What kind of waves? Water waves? Sound waves? Low frequency water waves move the boat up and down slower. Lower frequency sond waves make a lower town, but if its too low the human ear can't hear it. Or maybe you are talking about Electric and Magnetism? You should give more info in the question. It is too general.
What are infrasound waves?
Just like "infrared" is light that we can't see because its frequency is lower than the frequency of red light, "infrasound" is vibration or waves in air that we don't hear, because its frequency is lower that the lower limit of human sound perception.
Sometimes you feel the vibrations from a sound source before you hear the source itself Why is this?
Sound travels in waves. Our ears register these waves and convert them into noise; however, our ears can only detect a very small range of sound waves. Many sound waves have a frenquency that is much too high or too low for our ears to "hear". If you've ever blown a dog whistle and made your pup yelp in pain while you couldn't hear a thing then you understand. The vibrations that you feel are low frequency sound waves which your body can feel but your ears can't hear. It is only when the higher frequency waves get to you that you hear the source.
What is the relative frequency of a sound as perceived by a listener?
I think you mean pitch.
What is good about bats ears?
What is good about bat ears is the they can pick up high frequency waves and they are useful for echolocation.
