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37 Cards in this Set
- Front
- Back
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Hertz |
once cycle per second. Unit of measurment for sound |
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Frequency |
the rate at which something occurs in a given amount of time. |
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Echolocation |
Ability to calculate position and distance from an object by emitting a sound and receiving its bouncing. |
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Infrasound |
If frequency is lower than 20 Hz |
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Ultrasound |
If frequency is bigger than 20,000 Hz |
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Sound |
Vibrations that travel through the air or another means that can be heard when they reach a persons or animals ear. |
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Elasticity |
attribute of a material to recover its extension and shape at the moment a force that deforms its stops falling upon it. |
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Acoustics |
Branch of physics concerned with the properties of sound |
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Transducer |
transforms a type of energy int another one, and it may work as a generator or receiver. |
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Tuning fork |
object that when hit will vibrate and create acoustic energy that will hit the molecules of air surrounding it and will produce compression |
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Compression |
many molecules in a small space |
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Rarefaction |
when many molecules congregate in one place , and scatter somewhere else |
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Cycle |
complete sequence of a periodic vibration that goes from rarefaction to compression |
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Period |
time interval in which a cycle takes place |
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Sound wave frequency |
number of cycles that go through a same point during a seconf. measured in Hz |
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Wavelenght |
distance that the sound goes through in the complete cycle of change in pressure. |
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Amplitude |
distance between the equilibrium position and the maximum wave point. |
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Tone |
subjective perception of frequency |
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Decibel (dB) |
unit used to measure volume subjectively, comparisson between the minimum umber of humans are able to listen and the levels we want to calculate |
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Absorption- sound absoprtion |
when an object absorbs acoustic energy and creates heat |
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Reflection |
when the trajectory of acoustic energy changes direction when crashing with the edge of an object. |
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Refraction |
change of direction in the sound wave |
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Bitrate |
quality of compression |
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Codecs |
algorith used for encoding the information of a sound ona digital file. |
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Wrappers |
the way of organizing information related to the digital audio. |
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WAV |
audioformat with no compression, belonging to Microsoft |
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AIFF |
no compression audio exchange file format, used in apple plataform |
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CDA |
no compressions Red book audio standard ; it is an industrial standard used to encode the audio of compact (CDs) |
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MP3 |
high compression, not much data loss. has a patent |
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AAC |
advance audio encoding, supported by apple, higher level of compression without much quality loss |
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MIDI |
Musical Instrument Digital Interface; communication protocol that allows electronic musical instruments |
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Audacity |
audio editing software free |
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Garage Band |
apple´s audio editing software for which you have to pay |
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Monaural sound |
when audo is stored in one single channel and lacks spatial sensation |
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Stereophonic sound |
stored it two channels and can be reproduced in different loudspeakers |
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Surrounding sound |
stores in 6 to 8 channels giving a very high quality. |
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Streaming |
transmitting or receiving data |
