Expresion Digital

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Hertz

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A unit of frequency.

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Frequency

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The number of cycles that go through a same cycle.

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Echolocation

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To identify the intensity and length of the noise, and calculate the orientation and distance from the object.

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Infrasound

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Low frequency.

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Ultrasound

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High frequency.

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Sound

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The result of contractions and expansions of air on the surrounding space.

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Elasticity

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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

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The branch of physics concerned with the properties of sound.

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Transducer

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Can transform a type of energy into another one.

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Tuning Fork

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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 secon

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Compression

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When many molecules congregate in one place.

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Rarefaction

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When many molecules scatter somewhere.

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Cycle

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the complete sequence of a periodic vibration that 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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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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Wavelengh

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It is the distance that the sound goes over in a complete cycle of change in pressure and it is the physical measure of a cycle’s 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. Measured in hz.

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Decibel

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It is the unit used to measure the intensity of a sound.

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Absortion

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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. Its use doesn’t iinterfere with the playing speed. There are also codecs for audio files.

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Wrappers

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It is a metafile format whose specification describes how different elements of data and metadata coexist in a computer file.

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WAV

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It is a Microsoft/IBM audio file container format. It is the main format used on Windows systems for storing uncompressed, lossless audio.

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AIFF

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Audio Interchange File Format is an audio file format standard used for storing sound data electronically. The format was co-developed by Apple Computer in 1988 and is most commonly used on Apple Macintosh and Silicon Graphics computers.

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CDA

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It is a 44 byte virtual file generated by Microsoft Windows for each audio track on a standard format audio CD as defined by the Table of Contents

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MP3

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It is a size-compressed, lossy audio format. This means that it uses less disk space to store audio than uncompressed formats like WAV, but loses some of the original sound quality in doing so.

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AAC

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It is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format.

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MIDI

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is a compact, notes-based file format widely used for keyboard instruments. It stores how to play the music which MIDI keys are pressed, and their strength and duration.

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Audacity

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It is a free, very capable Audio Editor software application for Windows, Macintosh and Linux/Unix systems.

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Garage Band

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It is a software application for OS X and iOS that allows users to create music or podcasts.

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Monaural sound

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It is a single channel or track of sound created by one speaker and is also known as Monophonic sound or High-Fidelity sound.

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Stereophonic sound

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It is two separate audio channels or tracks of sound reproduced by two speakers. Stereo sound provides a sense of directionality because different sounds can be heard from two directions.

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Surround sound

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It is created by at least four and up to seven independent audio channels and speakers placed in front of and behind 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.