# sound energy

### 39 terms by ganda97

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### Mechanical waves

forms when a disturbance causes energy to be transferred through matter such as air or water

### Vibration

a rapid back-and-forth movement of an object

### Pitch

how high or low you perceive the sound to be

### Volume

how loud or soft a sound is

### A sound with ________ frequency has _______ pitch.

low frequency has low pitch

### A sound with high _________ has _________ pitch.

high frequency high pitch

frequency

pitch

sound

volume

### Describe three ways instruments produce sound?

A reed vibrates when you blow into it, hit a drum, plucks strings

### How do sound waves travel

They move in all directions from an object that makes a sound.

In decibels (dB)

### How does a bat fly at night?

The bats can produce sound that hits objects and bounces back in the form of a echo. The echo's help give information about the surroundings.

### How does a woodwind instrument create sound?

Through a thin piece of wood called a reed.

### How does sound travel?

In the form of compressed waves

Air

solid and liquid

### The speed of the sounds depends on what?

The type of medium which it's moving through.

A soft object.

### What happens when sound waves hit something?

Some of the energy is absorbed, some is reflected

A trumpet

### What is the difference between sound waves and light waves?

Sound waves travel in compressions in matter, but light does not compress matter.

### Amplitude

in sound, this determines how loud the sound is

### Compression

the areas where the particles of a longitudinal wave are compressed "bunch up"

### Decibel

the units we use to measure how loud the sound is

### Frequency

the number of waves in a certain period of time

### Hertz

the units we use to measure frequency

### Transverse wave

particles move perpendicular to the direction of the wave

### Mechanical wave

waves that have to have a medium - they can't travel through empty space

### Medium

any matter that waves travel through

### Pitch

how high or low the sound is

### Rarefaction

the areas where the particles of a longitudinal wave are sparse

### Reflection

the bouncing back of a sound wave after it hit a surface

### Sound energy

energy that comes from vibrating particles

### Vibration

small, rapid (quick) back and forth movement

### Wave

disturbance that carries energy through matter or through empty space

### Wave speed

how fast the wave travels

### Wavelength

the space from the middle of one compression to the middle of the compression next door to it

Example: