Term
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Definition
| a wave produced by vibrating objects/substances |
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Term
| What kind of wave is sound? |
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Definition
| mechanical and longitudinal |
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Term
| The frequency of sound waves are equal to_________________. |
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Definition
| The frequency of the vibrating objects |
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Term
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Definition
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Term
| What is the range of human hearing? |
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Definition
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Term
| What is an infrasonic sound? |
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Definition
| a sound with a pitch below 20Hz |
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Term
| What is an ultrasonic sound? |
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Definition
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Term
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Definition
| Sent out in all directions from the vibrating source. |
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Term
| What is an elastic material? |
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Definition
| changes shape in respond to applied force, the returns to its origional shape once forces are removed. Elastic materials transmits sound well. |
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Term
| Why does sound travel best in solids? |
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Definition
| Solids are dense. They have particles closely packed. When vibrations hit the particles , the particles hit each other easier. Hence, sound travels faster. |
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Term
| What is the speed of sound? |
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Definition
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Term
| What frequency sounds travel further? |
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Definition
| lower frequency=further distance |
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Term
| What happens when sound hits a surface? |
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Definition
| Some sound is absorbed, some is reflected. |
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Term
| What is reflection of sound called? |
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Definition
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Term
| What do you call it when many echos combine and makes sound garbled? |
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Definition
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Term
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Definition
| study of how sound interacts with surfaces and rooms |
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Term
| Any elastic object will vibrate at its own frequency when disturbed. What is this called? |
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Definition
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Term
| What happens when frequency of forced vibrations on an object matches its natural frequency? |
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Definition
| dramatic increase of amplitude occurs(aka. resonance) |
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Term
| What are the three characteristics of music? |
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Definition
1. Pitch
2. Loudness
3. Quality |
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Term
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Definition
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Term
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Definition
| amount of change in pressure |
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Term
| What are the units of intensity? |
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Definition
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Term
| What is the threshold of hearing? |
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Definition
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Term
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Definition
| sensation that may differ when various people are exposed to the same sound. Loudness is perceived. |
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Term
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Definition
| allows us to distinguish one instrument from another |
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Term
| What are overlapping tones? |
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Definition
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Term
| What is the lowest frequency that determines the pitch of the note called? |
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Definition
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Term
| What are partial tones whose fundamental frequencies are whole multipliers of the fundamental frequency are called ____________. |
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Definition
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Term
| What is an analog recording? |
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Definition
| recorded signal is continuously variable |
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Term
| Air pressure vibrations are converted into an electrical signal that has a current or voltage directly proportional to the air pressure at each instant. What devise is used for this? |
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Definition
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Term
The changing current/voltage will alter the magnetization of a tape or the displacement of a groove on a record cutter to record the sound.
True False |
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Definition
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Term
| What is a digital recording? |
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Definition
| the physical properties of the sound are converted into a series of numbers |
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Term
| In nature, what type of sound is sound? (awkward phrasing sorry) |
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Definition
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Term
| What has to be attached to a microphone? |
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Definition
| analog-to-digital converted |
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Term
| After converted to digital, what happens to sound? |
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Definition
| the sound is then put into a compact disc/hard drive |
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Term
| what is a stereo recording? |
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Definition
| two microphones. two speakers. (may be two or more n some cases) |
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Term
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Definition
| one microphone. one speaker. |
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Term
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Definition
| part of recording process. all of the different instruments and voices combined into one finalized sound. |
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Term
| How do you convert digital to analog? |
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Definition
| Use a digital-to-analog converter |
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Term
| When is this step not necessary? |
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Definition
| If the signal starts from a LP/record or tape |
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Term
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Definition
| devise that increases amplitude |
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Term
| What is the amplifier connected to, that creates air pressure variations directly proportional to to current of the amplified signal? |
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Definition
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