Physics EXAM

• A form of energy which travels in the form of waves. It produces hearing sensation in our ears.

  Sound
• To produce sound, we are to make _____ in our body

  vibrations
• sound is produced when an individual object is?

  disturbed and vibrating
• To and Fro motion of a particle about it’s mean position

  Vibration
• Sound waves need a material medium such as solid, liquid and gases for propagation.
• A space that is completely empty of everything, including air.


  Vacuum
• Can sound travel through a vacuum?

  No
• This is the disturbance or vibration. Moves through air


  Soundwave
• How quick does sound wave travel in solids?


  fast
• How quick does a sound-wave travel through a gas?

  Slow
• Where the air molecules are closer together and has high pressure.


  Compression
• Where the air molecules are further a part and has lower pressure


  Rarefraction
• Made by moving your hand in and out. Goes to the same direction as the wave is traveling and goes back and fourth.


  Longitudunal
• The direction goes up and down


  Transverse wave
• Electromagnetic waves are a example of?

  Transverse waves
• a characteristic of sound by which we can distinguish between a shrill and a grave sound

  Pitch
• Pitch of the sound depends upon the frequency of a sound
• Characteristic of sound by which loud and faint sounds can be distinguished

  Loudness
• we describe waves using 3 properties all waves have:

  amplitude, wavelength and frequency
• The distance from one point on a wave to the same point on the next wave

  Wavelength
• The distance from the centre of the wave to the highest or lowest point

  Amplitude
• Amplitude is determined by the amount of energy in a wave
• amplitude measures from?

  Crest to trough
• How many waves go past 1 second

  Frequency
• to display and analyze the waveform of electronic signals. if you want to see what sound waves are like

  Oscilloscope
• a soft sound produces a small amplitude
• a loud sound produces a large amplitude
• To make something sound louder

  amplifier
• The outer ear is composed of?

  Pinna, eardrum and auditory canal
• The middle ear is composed of?

  Ossicles and Oval window
• The inner ear is composed of?

  semicircular canal and cochlea
• The outer ear gathers the sound and directs it to the eardrum. Once there, it makes the eardrum vibrate, making the ossicles vibrate as well.
• They pass the vibration onto the oval window then into the inner ear. When the oval window vibrates, it transmits the vibration to the fluids.
• Inside the cochlea are tiny hairs that move when the fluid moves. The movement of these hairs sends electrical signals along the auditory nerve to the brain where they are interpreted as sounds.
• Make up your middle ear and is the smallest bones in our body

  Ossicles
• Shaped like a snail shell and contains fluid

  Cochlea
• Helps you balance

  Semicircular Canals
• What are the possible outcomes if loud noises are exposed to our ears for a long period of time? Makes a hole in your eardrum, wax can affect your hearing, Ear infection and Head injuries
• A microphone transducer converts the energy from a sound wave info a electrical signal
• a loud speaker transducer converts the electrical signal into a sound wave