Audio

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Hertz

Back 1

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

Back 2

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

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Echolocation

Back 3

It is the location of an object through the reflection of sound waves. It is used by some animal species such as bats and cetaceans, and it may have technological applications such as the sonar system.

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Infrasound

Back 4

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

Back 5

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

Back 6

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

Back 7

Material has to recover its extension and shape when a force that deformed it stops being put on it.

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Acoustics

Back 8

It is a branch of physics that studies the sound production, transmission, storing, perception and reproduction.

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Transducer

Back 9

It is the equipment that transforms a type of energy into another one and may work as a recipient or as a generator

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Tuning Fork

Back 10

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

Back 11

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

Back 12

It refers to making a gaseous body less dense.

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Cycle

Back 13

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

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Period

Back 14

It is the time interval in which a cycle takes place.

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Sound Wave Frequency

Back 15

Measured 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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Wavelenght

Back 16

Is the distance between identical points in the adjacent cycles of a waveform signal propagated in space or along a wire, as shown in the illustration.

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Amplitude

Back 17

is the objective measurement of the degree of change (positive or negative) in atmospheric pressure (the compression and rarefaction of air molecules) caused by sound waves.

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Tone

Back 18

is a literary compound of composition, which encompasses the attitudes toward the subject and toward the audience implied in a literary work.

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Decibel

Back 19

Is a logarithmic unit used to express the ratio between two values of a physical quantity, often power or intensity.

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Absorption

Back 20

refers to a material, structure or object absorbing sound energy when sound waves collide with it, as opposed to reflecting the energy.

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Reflection

Back 21

Reflection of sound waves off of surfaces is also affected by the shape of the surface. As mentioned of water waves in Unit 10, flat or plane surfaces reflect sound waves in such a way that the angle at which the wave approaches the surface equals the angle at which the wave leaves the surface.

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Refraction

Back 22

Refraction of sound waves is most evident in situations in which the sound wave passes through a medium with gradually varying properties.

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Bitrate

Back 23

describes the rate at which bits are transferred from one location to another.

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Codecs

Back 24

A device or program that compresses data to enable faster transmission and decompresses received data.

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Wrappers

Back 25

a metafile format whose specification describes how different elements of data and metadata coexist in a computer fil

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WAV

Back 26

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

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AIFF

Back 27

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

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CDA

Back 28

virtual file generated by Microsoft Windows for each audio track on a standard "Red Book" CD-DA format audio CD as defined by the Table of Contents.

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MP3

Back 29

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

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ACC

Back 30

an audio coding standard for lossy digital audio compression

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MIDI

Back 31

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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Streaming

Back 32

is when a multimedia file can be played without being completely downloaded first

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Surround Audio

Back 33

is a term used to describe a type of audio output in which the sound appears to "surround the listener" by 360 degrees.

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Stereophonic Sound

Back 34

divides sounds across two channels (recorded on two separate sources) then the recorded sounds are mixed so that some elements are channeled.

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Monarual Sound

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this early sound system used a single channel of audio for sound output.

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Garageband

Back 36

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

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Audacity

Back 37

is the name of a popular open source multilingual audio editor and recorder software that is used to record and edit sounds.