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37 Cards in this Set

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Group 404


José Sánchez


A01570148


hertz

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.

Frequency

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

Echolocation

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 solar system.

Infrasound

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

Ultrasound

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 also used in medicine.

Sound

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

Elasticity

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

Acoustics

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

Transducer

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

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.

Compression

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

Rarefaction

It refers to making a gaseous body less dense.

Cycle

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

Period

It is the period of time that happens in a cycle.

Sound Wave Frequency

Number of sound waves per second.

Wavelenght

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.

Amplitude

It refers to the distance between the equilibrium position and the maximum wave point. When your mom asks you to turn the volume down, she is actually asking you to reduce the amplitude of the sound wave. The volume is the subjective perception of amplitude since it depends on each person´s auditory capabilities.

Tone

It refers to the subjective perception of frequency. There are high pitched tones and low pitched tones which are measured in hertz.

Decibel (dB)

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

Absorption

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

Reflection

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

Refraction

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

Bitrate

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

Codecs

It means coder-decoder. It is software that consists on an algorithm to compress and decompress video in real time. Its use doesn't interfere with the playing speed. There are also codecs for audio files.

Wrappers

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 configurations, etc. A wrapper can use different codecs.

WAV

It is the most used format with no compression. It belongs to Microsoft/IBM.

AIFF

It is the format used in the Apple platform.

CDA

It is an industrial standard used to encode the audio of compact (CDs).

MP3

It became popular because it was one of the first ones to get the highest compressions without much data loss. It is one of the most used for webpages. This software has a patent, which means it is necessary to pay in order to be used on a player or an audio editing app.

AAC

It is supported by Apple to be used on their devices. It is the successor of MP3 because it can handle a larger level of compression without reducing its quality.

MIDI

Communication protocol that allows electronic musical instruments, synthesizers, computers, and other devices to communicate among them.

Audacity

Software for recording and editing audio.

Garage Band

Software in which you can play digital instruments, record ,and edit audio.

Monaural Sound

It is given when an audio is stored in one single channel and it lacks spatial sensation. It is also called mono.

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 (left or right)

Surround sound

Sound output designed for the listener to be able to hear the sound in a range of 360 degrees.

Streaming

Type of reproduction in which it is not necessary to download the file to a device, it makes the reproduction faster and more direct for the user.