Sound be vibin'!
How are sounds made?
By making objects vibrate.
What does the frequency of a sound determine?
The pitch of a sound.
What does amplitude measure?
How loud or quiet a sound is.
How many sections is the human ear broken into and what are they called?
Three: Inner, middle, and outer ear
How does sound travel?
Energy waves or compression waves. By vibrating molecules and forming a chain reaction that extend out from the source of vibrations.
What unit is used to measure a sounds frequency?
Hertz and Kilohertz, Hz or KHz.
Sound travels fastest through a __________than it travels through a liquid or gas.
What is solid.
The volume of sound is measured in unit called ______________.
What is decibels.
What is the scientific term for an ear drum?
Tympanic membrane.
Does sound move through mediums more like a slinky wave (longitudinal) or waves in the ocean (transverse).
More like slinky waves or longitudinal waves.
Which of these sounds has the highest pitch?
a) 100 Hz
b) 250 Hz
c) 1 kHz
c
What does the height of a sound wave on a graph tell us about the sound?
What is it's amplitude.
Looping projections, called semicircular canals, are found in the inner ear. What are they responsible for?
Balance and coordination.
When a sound wave bounces off a surface, what do we call it?
What is a reflection or an echo.
How does a dog whistle work?
Dogs can hear higher pitched sounds than humans can. A dog hears the high pitched whistle while humans cannot.
What do we call a space that contains few or no molecules. Think outer space.
A vacuum.
Which of these negatively effect the human ear: Amplitude or Frequency
Amplitude
This snail-like organ found in the inner ear sends electrical signals to the brain when its hair cells are moved by fluid moving back and forth in it.
The cochlea.
What two scientific terms are used to describe how loud a sound is and what pitch it has?
Amplitude and Frequency
What do we call a visual representation of sound?
A spectrogram.
Explain how the speed of sound changes and what factors determine its speed.
The medium it travels through determines its speed. Also factors such as air temperature and humidity can have an affect.
Sound would travel most quickly through which object: air, steel, outer space or water.
What is steel.
What do we call it when an animal finds objects using echos.
What is echolocaction.