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38 Cards in this Set
- Front
- Back
Sebastián Saladaña A01570274 |
Group 403 |
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hertz |
It is the unit in which frequency is measured |
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frequency |
It is the measure of the amount of waves that pass through a given point per second
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echolocation |
Process in which animals identify the intensity and length of the noise, and they can then calculate the orientation and distance from the object.
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infrasound |
When a sound has a frequency of under 20 Hz |
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ultrasound |
When a sound has a frequency of under 20,000 Hz
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sound |
Vibrations that travel through the air or other means and can be heard when they reach a person's or animal's ear.
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elasticity |
The attribute of a material to recover its extension and shape at the moment a force that deforms it stops falling upon it.
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acoustics |
The branch of physics concerned with the propertie of sound. |
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transducer
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Transforms a type of energy into another one, and it may work as a generator or as a reciever. |
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tuning fork
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When we hit the tuning fork, it will vibrate and create acoustic energy that will hit the molecule of air surrounding it, and it will produce a compression |
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compression |
When molecules congregate all in one place
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rarefaction |
When compressed molecules scatter somewhere else.
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cycle |
Refers to the complete sequence of a periodic vibration that goes from rarefaction to compression
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period |
It is the time interval in which a cycle takes place.
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sound wave frequency |
The number of cycles that go through a same point during a second. Number of cycles per second.
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wavelength |
Refers to the distance that the sound goes through in a complete cycle of change in pressure. It is the physic measure of cycle length.
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amplitude |
The distance between the equilibrium position and the maximum wave point.
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tone |
Refers to the subjective perception of frequency. There are high pitched tones and low pitched tones which are measured in Hertz. |
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decibel (dB) |
Unit used to measure volume. It is a comparison measure between the minimum humans are able to listen (0 dB) and the level we want to calculate.
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absorption |
Part of the acoustic energy will be absorbed by the object and then transformed into heat. |
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reflection |
One part of the acoustic energy will change its direction when crashing with the edge of an object.
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refraction |
A change of direction in the sound wave. It happens when there is a difference in the means of propagation due to the variation in the density of the materials.
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bitrate |
The quality of compression measured in kilobytes per second.
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codecs |
The algorithm used for encoding the information of a sound on a digital file.
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wrappers |
The way of organizing information related to the digital audio. |
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WAV |
(Wave) it is the most used format with no compression. It belongs to Microsoft/ IBM |
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AIFF |
Format used in the Apple platform |
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CDA |
It is an industrial standard used to encode the audio of compact CDs.
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MP3 |
It is the first one to get the highest compression without much data loss. It is patented.
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AAC |
It is supported by Apple to be used on their devices. It is the succesor of MP3 becuase it can handle a larger level of compression without reducing its quality
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MIDI |
A communication protocol that allows electronic musical instruments, synthesizers, computers, and other devices to communicate among them.
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Audacity |
Application which enables editing audio files. It is an amateur editing software. |
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Garage Band |
Application which enables editing audio files. It is an amateur editing software. |
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monaural sound |
It is given when an audio is stored in one single channel and it lacks spatial sensation. It is also called mono.
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stereophonic sound |
It is also called stereo sound. It is stored in two channels that can be reproduced in different loudspeakers and simulate the sensation of listening on one single side.
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surround sound |
It stores the information in eight different channels. In order to make surround sound effect, the loudspeakers have to be strategically placed at certain distance and directed towards certain angles. |
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streaming |
The user pays a monthly fee to access to a company's collection; automatic lists may be generated according to eh user's preference or new releases are suggested. |