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37 Cards in this Set
- Front
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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. |
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Frequency |
It is the number of cycles that happen in a second. |
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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. |
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Infrasound |
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 |
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. |
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Sound |
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 |
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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Acoustics |
It is a branch of physics that studies the sound production, transmission, storing, perception and reproduction. |
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Transducer |
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 |
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 |
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 |
It refers to making a gaseous body less dense. |
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Cycle |
It is the complete sequence of a periodic vibration. It goes from rarefaction to compression. |
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Period |
It is the period of time that happens in a cycle. |
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Sound Wave Frequency |
Number of sound waves per second. |
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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. |
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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. |
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Tone |
It 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) |
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 |
It is the process in which sound is absorbed by an object when crashing against it. |
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Reflection |
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 |
It is the change in direction of the sound wave due to a variation of the means of scattering. |
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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. |
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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. |
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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. |
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WAV |
It is the most used format with no compression. It belongs to Microsoft/IBM. |
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AIFF |
It is the 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 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. |
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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. |
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MIDI |
Communication protocol that allows electronic musical instruments, synthesizers, computers, and other devices to communicate among them. |
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Audacity |
Software for recording and editing audio. |
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Garage Band |
Software in which you can play digital instruments, record ,and edit audio. |
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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 (left or right) |
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Surround sound |
Sound output designed for the listener to be able to hear the sound in a range of 360 degrees. |
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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. |