# What happens to sound in a tube?

## What happens to sound in a tube?

Sound waves trapped in a tube generate sounds a frequencies dependent on the length of the tube. In the case of a tube that is open at one end, a node is forced at the closed end (no air molecules can vibrate up and down) and an antinode occurs at the open end (here, air molecules are free to move).

### Can sound travel through tubes?

Sound waves are longitudinal waves in a medium such as air. The molecules in the medium vibrate back and forth from their equilibrium position. For example, when a musician blows into a tube such as a flute, the sound produced comes from waves that travel along the length of the tube.

#### Which length of tubing makes the highest sound?

The larger the air column, the larger the wavelength. Frequency is inversely proportional to wavelength, thus the tube with the smallest air column will have the highest frequency. So the answer is tube C. b) What is the wavelength of the 1st harmonic (i.e. fundamental) of tube B?

What is a open tube?

In an open tube, the standing wave of the lowest possible frequency for that particular length of tube (in other words, the fundamental) has antinodes at each end and a node in the centre. This means that an open tube is one-half wavelength long.

Why does sound reflect at open end?

The sound wave is made of regions in which air has a pressure above atmospheric pressure and regions in which the air pressure is below atmospheric pressure. So the wave reflects off the open end, with a compression turning into an expansion.

## When an air column in a tube open at both ends?

If the end of the tube is uncovered such that the air at the end of the tube can freely vibrate when the sound wave reaches it, then the end is referred to as an open end. If both ends of the tube are uncovered or open, the musical instrument is said to contain an open-end air column.

### How does length of tube affect sound?

The longer the tube is the lower the pitch of the note that it can emit. When a tube is heated it expands and so is longer! So, if the temperature of the tube goes down the length will be shorter and the pitch of the note should get higher.

#### What is an open ended tube?

Though the metal tube may be more than a meter in length, it is often curved upon itself one or more times in order to conserve space. If the end of the tube is uncovered such that the air at the end of the tube can freely vibrate when the sound wave reaches it, then the end is referred to as an open end.

Can a sound wave reflect off the open end of a tube?

Sound travels in pipes at the same speed that it travels in open air. At a closed pipe end the sound must bounce, be reflected, from the closed end. At an open end the sound is also reflected. In order for the sound to diffract out of the open end of the tube a reflection must be generated travelling back up the tube.

Is it possible for sound to travel through air?

If your neighbors could hear it, that would mean that the noise was traveling through the air. As scores of science fiction movies keep telling us, sound can’t exist in a vacuum. So no air, no sound.

## Which is faster for sound to travel through water or air?

1. Yes, sound can travel under the water. 2. It moves four times faster through water than through air. 3. It moves about thirteen times faster in wood than air. 4. No, there is no sound in space.

### Can a sound wave travel through a vacuum?

Sound waves can also be thought of as pressure waves. One important characteristic of sound waves is that they are mechanical waves. Normally,we hear sound waves that have traveled through water, wood, the Earth, and many others substances. Sound cannot travel through a vacuum like outer space.

#### What causes sound to travel through a medium?

Sound is a type of energy made by vibrations. These vibrations create sound waves which move through mediums such as air, water and wood. When an object vibrates, it causes movement in the particles of the medium. This movement is called sound waves, and it keeps going until the particles run out of energy.