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Noises present in audio signal may be of various kinds like environmental noises, transmission noises etc.
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What are the key design parameters for audio amplifiers?
Frequency response, gain, noise, and distortion
What is an unwanted signal that is mixed with the normal voltage entering a computer?
Noise
Why the received signal in analog communication is distorted by the channel noise than that of digital communication?
If an RF signal is AM modulated with a analogue signal any noise will add or subtract to the amplitude of the RF signal and will be present in the audio signal after detection, also will the noise add itself to the audio signal, where as in digital communication a slight variation in the amplitude of the signal is of no concern because you only work with ones and zeros, it's high or it's low
What is the total harmonic distortion of a Bose stereo system?
Harmonic distortion belongs to all amplifiers, loudspeakers and simply all electrical equipment you use. When it comes to audio, the only effect you will hear is a constant resonant low noise if the speakers aren't good at handling harmonic distortion. None of the Bose speakers I have tested so far produce that noise, so you don't have to worry about that.
What do engineers use the signal to noise ratio for?
Signal to noise ratio is a measure of signal strength to the background noise. Engineers use the signal to noise ratio to improve digital signal processing.
What are the noise factors for radio tv and audio systems?
The measurements include Signal to Noise Ration (dB), Total harmonic distortion (%) and Channel crosstalk (dB).
What is the basic difference between noise and distortion?
Noise is basically an unwanted signal which is mixed in fundamental signal while the distortion is a disturbed fundamental signal affected due to external disturbance. It is just like box. A box is compressed and its shape is disturbed while the box could also be destroyed by adding of the other materials like putting extra heavy material in it. In this way changing of the shape of the box by compression is considered to be distortion and disturbing the form by adding the material is considered to be noise.
What is defined as any unwanted electrical signals that are induced onto power or signal lines?
An unwanted signal is noise.
What are the key design parameters for audio amplifiers?
Frequency response, gain, noise, and distortion
What is an unwanted signal that is mixed with the normal voltage entering a computer?
Noise
What is communication distortion?
Communication distortion refers to any changes or disruptions in the meaning of a message as it is passed from one person to another. This can be caused by factors such as noise, language barriers, or misunderstandings. It is important to be aware of communication distortion in order to ensure effective and clear communication.
Why the received signal in analog communication is distorted by the channel noise than that of digital communication?
If an RF signal is AM modulated with a analogue signal any noise will add or subtract to the amplitude of the RF signal and will be present in the audio signal after detection, also will the noise add itself to the audio signal, where as in digital communication a slight variation in the amplitude of the signal is of no concern because you only work with ones and zeros, it's high or it's low
Do you need shielded XLR cable for long distances?
Yes, their purpose is to prevent any unwanted noise in the signal.
What is the difference between analog and digital in very simple English?
Analog signals represent values with a continuously variable level. The signal has an infinite number of possible levels. Because the signal is infinitely variable, it can be affected by outside interference as well as by the circuits that carry and process the signal. These are the sources of noise and distortion. A system that handles analog information must be able to operate at the highest frequency that the signal will use. For audio, that is typically 20KHz and for video, in the region of 10MHz. A digital signal represents values in discrete steps and is often shown as a numeric value. The signal has a limited number of steps and there is no way to represent any intermediate values. The limitation in the number of steps is in itself a source of distortion but the nature of digital signals is that they are resistant to distortion and noise so the signal will not be degraded further. As the number of possible values increases, so the distortion caused by digitizing the signal will reduce. A digital system typically has to operate at far higher frequencies than its analog counterpart. Using audio signals as an example, a typical digital signal will capture a 16 bit value 44000 times each second. The frequency response of circuits handling the data will need to be in the region of 700KHz rather than the 20KHz for an analog signal.
Which software is best to eliminate background noise in a movie file?
The best way to eliminate unwanted noise in a video file is to separate the audio into its own file and run it through filters in an audio editing program like Sound Forge.
What is the difference between noise and attenuation?
Noise (as related to a radio signal I suppose) is an unwanted signal being processed by a receiver. Attenuation is a loss of the intended signal before it gets to the receiver (usually due to such things as distance, line of sight obstructions, etc.
What is a distortion analyzer?
A distortion analyzer is an electronic test instrument that measures the accuracy of an electronic circuit at reproducing a wave. For instance, an audio amplifier might have a sine wave input to it, and the distortion analyzer measures how close the output is to a sine wave. If the output is clipped, the wave will be distorted, and the analyzer will measure the amount of harmonics present. The analyzer does this by supplying a low distortion sine wave test signal which is connected to the device under test. The output from the device is connected to the input of the analyzer where the original input signal is filter out with a precision notch filter. Anything left over after filtering represents distortion components and noise. Amplifiers will frequently have a "Total Harmonic Distortion plus Noise" specification which is an accurate term for the quantity measured by a distortion analyzer. There are many manufacturers of distortion analyzers. The Hewlett-Packard models 331a and 333 are laboratory standard instruments. Other notable manufacturers are Sound Technology Corporation and Textronix.
