Expresion Digital

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EXPRESION DIGITAL

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MELANIE MARLENE IÑIGUEZ

A01039943

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HERTZ

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It is a frequency unit from the international measuring system that equals the repetition of a phenomenon whose period is a second. It is abbreviated as HZ

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FREQUENCY

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It is the number of cycles that happen in a second.

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ECHOLOCATION

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It is the location of an object through the election of sound waves. It is used by some animal species. It may have technological applications such as the sonar system.

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INFRASOUND

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It is a sound whose vibration frequency is lower than the one which can be perceived by the human ear.

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ULTRASOUND

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It is the sound whose frequency of vibrations is superior to the highest limit perceived by the human ear. It has many industrial applications and it is also used in medicine.

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SOUND

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It is the sensation produced in the hearing organ by the vibrational movement of the bodies that is transmitted through an elastic means.

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ELASTICITY

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The attribute of a material to recover its extension and have at the moment a force that deforms it stops falling upon it.

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ACOUSTICS

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Acoustics refers to the branch of physics concerned with the properties of sound

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TRANSDUCER

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A transducer transforms a type of energy into another one, and it may work as a generator or as a receiver

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TUNING FORK

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Tuning fork It is a voice and instrument regulator that consists of a steel sheet folded as a hook with a foot, and when it is hit, it presents 435 vibrations per second

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COMPRESSION

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Compression It is the effort that an object is subject to by the action of two opposing forces that tend to diminish its volume

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RAREFACTION

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Rarefaction It refers to making a gaseous body less dense.

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CYCLE

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It is the complete sequence of a periodic vibration. It goes from rarefaction to compression

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PERIOD

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It is the period of time that happens in a cycle

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SOUND WAVE FREQUENCY

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Sound wave frequencymeasured in Hertz (Hz) is the number of cycles that go through a same point during a second. In other words, it is the number of cycles per second,

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WAVELENGTH

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It 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

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It is the distance between a balance point and the highest wave point

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TONE

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It is the subjective perception of frequency. There are high tones and low tones. In order to measure them, we use hertz

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DECIBEL (DB)

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It is a measuring unit that compares the minimum that human can hear (0dB) against the level we want to measure

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ABSORPTION

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It is the process in which sound is absorbed by an object when crashing against it

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REFLECTION

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It is the quantity of acoustic energy that will change direction when it crashes against the edge of an object

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REFRACTION

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It is the change in direction of the sound wave due to a variation of the means of scattering

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BITRATE

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It is the transmission rate. It refers to the number of bits that is transmitted in a unit of time, usually kilobits per second

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CODECS

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It means coder-decoder. It is software that consists on an algorithm to compress and decompress video in real time

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WRAPPERS

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It is the way of organizing information related to digital audio that is not part of the sound per se such as headlines, artwork, encoding cconfigurations, etc. A wrapper can use different codecs

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WAV

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A Microsoft and IBM audio file format standard for storing an audio bitstream on PCs.

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AIFF

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An audio file format standard used for storing sound data for personal computers and other electronic audio devices.

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CDA

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The file extension that is viewed in Windows Explorer when a music CD is loaded

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MP3

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An audio coding format for digital audio which uses a form of lossy data compression

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AAUC

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An audio coding standard for lossy digital audiocompression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates.

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MIDI

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A technical standard that describes a protocol, digital interface and connectors and allows a wide variety of electronic musical instruments, computers and other related devices to connect and communicate with one another.

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AUDACITY

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A free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems

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GARAGE BAND

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A software application for OS X and iOS that allows users to create music or podcasts. It is developed and sold by Apple Inc

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MONAURAL SOUND

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Monaural or monophonic sound reproduction (often shortened to mono) is single-channel.

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STEREOPHONIC SOUND

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A method of sound reproduction that creates an illusion of directionality and audible perspective.

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SURROUND SOUND

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A technique for enriching the sound reproduction quality of an audio source with additional audio channels from speakers that surround the listener

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STREAMING

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It is the reproduction of audio and video files with no need to be downloaded to a device. It is played through fragments sent sequentially through a net, usually, the Internet