Closed headphones - Closed headphones Closed headphones...

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Closed headphones. Closed headphones allow more or less complete auditory isolation of the subject who listens and also prevent the reproduced sound go outside, so their applications tend to be more dedicated to the professional field as studio monitoring or mix DJ in clubs. c)-ear. The-ear hearing aids are small, about the size of a button inserted into the ear and allow the listener greater mobility and comfort, but its sound quality never reaches the supra-aural and circumaural models. Its most common use is to sound amplification for hearing impaired and for listening to portable players (Walkman, Discman, iPods). 2.5.- Plotters. 2.5.1 Concept and Use. A plotter or plotter is a printing device connected to a computer, specifically designed to draw vector graphics or line drawings: plans, drawings of parts, etc. Performed with great precision graphic prints to a printer might not get. They are used in various fields: science, engineering, design, architecture, etc. Many are monochrome or 4 colors (CMYK), but there are eight or even twelve colors. 2.5.2 Their types and their evolution in time. The first used pen strokes or different colors. Currently there are frequent injection, which are more easily able to perform nonlinear and polychrome drawings are quieter, faster and more accurate.
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Plotters dimensions are not uniform. For professional graphics plotters are used to 157 cm. wide, while others not so complex, are from 91 to 121 cm. Video projector 2.6.- Projector (Video Beam). 2.6.1 Concept and Use. A video projector or projector cannon is a device that receives a video signal and projects the corresponding image on a projection screen using a lens system, allowing still images or moving. All video projectors use a very bright light to project the image, and the most modern can correct curves, smudges and other inconsistencies through manual settings. The video projectors are mostly used in presentation rooms or conferences, teachers classrooms, but also can find applications for home theater.
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