What is this question doing under Electricity and Magnetisim? Sound is a mechanical phenomenon. It does not have to be produced by a speaker.
Perhaps you have in mind the 60Hz hum in consumer electronic equipment? It is caused by poor filtering of the power supply, or by coupling from the pre-filtered power supply to sensitive circuitry elsewhere in the device.
Sometimes, it is even caused by the motion of the power transformer windings. As they age, the glue holding them in place breaks down and they can actually make noise by their own mechanical vibrations, without relying on the speakers at all. The winding does undergo an actual mechanical force from the electromotive force (emf) of the current flowing in it.
But in a new, properly designed power transformer, that mechanical motion will be too small to make substantial noise.
bats can hear sounds of higher frequency than humans (supersonic) because they produce them and these sound waves echo back to them by bouncing of items so that they can see how far something is. Just like in submarines. therfore they need to 'hear' these 'supersonic' waves to see.
Celsius is the inventor of this scale, so it is correct. Centigrade is referring to the method of calculation. I guess some people hear "centigrade" often, so they use it. Hope this helped!
0 dB is the threshold of hearing. Some people can hear a very soft sound and some cannot hear anything.
It depends very much on the sound pressure level the sound makes at the ears. Adults can often not hear sine tones higher than 15 kilohertz.
People tend to like the first idea they hear and are hesitant to hear other ideas that clash with the first idea.
I heard that younger people can hear reallly high pitched noises but when you get older you cant anymore. deaf people cant hear anything
Younger people can hear higher pitches better than older people primarily due to age-related changes in the ear, particularly the loss of hair cells in the cochlea that are responsible for detecting high-frequency sounds. Additionally, prolonged exposure to loud noises over time can lead to hearing loss, especially in higher frequency ranges. As a result, older adults often experience a decline in their ability to hear these higher pitches, making them less perceptive to sounds that younger individuals can easily discern.
High pitches are harder to hear than low pitches. However, with age, the ability to hear high pitches becomes even more difficult.
dogs can hear higher pitches. it doesn't "mean" anything. it is normal. dogs have better hearing.
When waves are closely spaced together, you would hear a higher pitch. This is because the frequency of the wave determines the pitch of the sound, with higher frequencies corresponding to higher pitches.
most animals like dogs can hear more higher pitches than us so they can hear it, you should not blow it too much, because it will hurt their ears.
Frequency and pitch are directly related in sound waves. The frequency of a sound wave determines the pitch we hear - higher frequencies result in higher pitches, while lower frequencies result in lower pitches. In other words, the higher the frequency of a sound wave, the higher the pitch we perceive.
...pitches that are higher (greater frequency of waves) than any one neuron is capable of transmitting.
No, people cannot hear your thoughts. Thoughts are internal mental experiences that are not audible to others.
Most people can hear frequencies ranging from about 20 Hz to 20,000 Hz, with the ability to hear higher frequencies decreasing with age.
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...
to hear my recording on internet for others i put connect with the head phones to helpout