Sound Waves

Humans can hear with in a range of 20 Hz - 20,000 Hz. Below 20 Hz is infrasound, and above 20,000 Hz (20 kHz) is ultrasound.

Sound travels spherically from where it was made. If energy is to be conserved a sphere of an earlier point will have a higher flux density than one from a later point.

air

That mixture might be a discordant sound or a dissonant sound. It might possibly be a cacophony.

• SONAR on submarines and ships
• Ultrasound medical imaging machines
• Speakers
• Headphones
• Microphones
• Hearing aids
• Doctor's stethoscope (passive)
• Megaphone (passive)
• etc.

The Greek letter "lambda" is the symbol for wavelength.

The membrane that vibrates and transmits the vibrations is called the tympanic membrane or the eardrum. It is the divider between the external and middle chambers of the ear.

Yes it does. Higher pitched sounds have higher frequencies than lower pitched sounds.

"Radio" is the name we give to a section of the electromagnetic spectrum, so it can

include whatever wavelengths we decide to use that name for.

Radio is generally considered to be everything in the electromagnetic spectrum with

wavelengths of one millimeter or longer, corresponding to any frequency up to 300 GHz.

Microphones will convert sound waves into electrical signals. An ear (i..e human ear) will also convert sound waves into electrical signals.

The ultrasonics used in various applications like in Industrial , medical ,etc.

# INDUSTRIAL APPLICATION:

1. ultrasonics are used for soldering and drilling purposes .

2. ultrasonics are used for cutting and welding purposes also .

3. ultrasonics are used to emulsify immiscible liquids like mercury and water.

4. ultrasonics are used for cleaning of tiny objects like watches etc .,

5. ultrasonics are also used in the sterilization of water and milk.

#MEDICAL APPLICATION

1.Ultrasonics waves are used for relieving neuralgic and rheumatic pain .

2.Ultrasonics waves are used to destroy dangerous tissues in the human bodies .

3. Ultrasonics are used in extraction of broken teeth without pain .

4. Ultrasonics waves are used to find the velocity of blood flow and the movement of heart in human body also .

water Dense solid objects

Same way it travels through air;

each molecule vibrates the one next to it

which then vibrates the one next to (the new it)

and so-on.

No, if that were true, every time you heard thunder you would feel a huge wind. The movement of air particles cause the sound to propagate (go through the air), but the particles themselves don't really go anywhere (except where they would have gone anyway in silence). It's analogous to waves on the water: If you drop a rock into a pond, you can see the resulting waves going out in growing circles, but the water molecules themselves are moving only up and down. A simple experiment that shows this is putting a small air-filled ball on a pond and dropping a rock into the water near it. Instead of the ball being carried away by one of the resulting waves, it moves only up and down.

Ultra Sound

First you convert the sound into a modulated electric current using a microphone, then you convert the modulated electric current into a visible pattern using an oscilloscope.

A subjective measure of sound is whether something is too loud, or too soft. A scientific measure of sound is gauged in the decibel level of the noise.

A wind chime has several objects which produce a "chime" when they strike each other. When a wind chime is left hanging freely, the wind makes the objects move and they strike each other to produce a chiming sound.

The amplitude (The height of the wave) of the wave increases as the sound gets louder.

That would depend on many factors. Length, thickness, density, resonance....too many factors to take a stab at an answer.

1. the waves spread out over a larger area
2. the waves are absorbed by the medium as they pass through it
3. the waves are being scattered by irregularities in the medium and don't all proceed forward
4. etc.

1. Sound waves enter your outer ear and travel through a narrow passageway called the earcanal, which leads to your eardrum. Your eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in your middle ear. These bones are called the malleus, incus, and stapes.

Particles. They can't travel through a vacumm