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Sound
Sound key terms
Question | Answer |
---|---|
The part of a longitudinal wave where the particles are squeezed together | Compression |
The part of a longitudinal wave where the particles are spread apart | Rarefaction |
The ability of a material to bounce back after being disturbed | Elasticity |
What property affects the pitch we hear? | Frequency |
What property of a wave affects the loudness of a sound? | Amplitude |
Sound with a frequency too high for humans to hear | Ultrasound |
Sound with a frequency too low for humans to hear | Infrasound |
A sound wave that is reflected as it strikes an object | Echo |
How will adding foam around an object affect the sound we hear? | The foam absorbs the vibrations, making the sound softer |
What is the unit for frequency? | Hertz (Hz) |
What unit is loudness measured in? | Decibels (dB) |
What are the three bones in the middle ear called? | Hammer, Anvil, & Stirrup |
Which part of the ear transmits a signal to the brain? | Cochlea |
What type of wave is sound? | Longitudinal & Mechanical |
If you hit a drum harder, how will it sound? | Louder, you are using more energy, which affects the amplitude |
Why does a flute have a higher pitch than a tuba? | Smaller objects vibrate faster, making a higher pitch (frequency) |
All sounds are created when an object moves or causes... | Vibrations |
Why did the salt bounce around on the plastic wrap? | Sound waves disturbed the plastic wrap causing the salt to move |
What material does sound travel fastest through? | Solid; because as the object vibrates it pushes against the air molecules creating compressions and rarefactions. |
Will a flute or a drum create sound with a longer wavelength? | drum; because it is larger |