Feedback is the “squealing” or “howling” generated between microphones and loudspeakers. Feedback occurs if a mic is too close to the front of a loudspeaker.

One way to avoid feedback is through proper microphone and loudspeaker placement. The best strategy is to place microphones near the origin of the sound to be reinforced and physically as far from, and behind the loudspeakers as possible. ...

An audio signal is an electrical representation of a sound. The following is a typical audio signal chain:

1. The sound source creates sound wave vibrations in the air.
2. These vibrations of the sound waves are picked up by a microphone.
3. The microphone converts the vibrations into an electrical signal.*
4. The electrical signal is processed.
5. Eventually, the signal ends up in an output device (such as an earphone or loudspeaker).
6. The output device converts the electrical signal back into sound waves....

A DVD Photo slideshow is a photo video edited, adding titles, background music and special effects between photos....

The video editing remove noise and unnecessary scenes from your original video, to make it stand out, also, add music, narration and special effect, forming and scene main menu that separate scenes in chapters to make it more attractive.

Video editing is the process of editing segments of motion video footage, special effects and sound recordings. Motion picture film editing is a predecessor to video editing and, in several ways, video editing simulates motion picture film editing, in theory and the use of non-linear and linear editing systems. Using video or film, a director can communicate non-fictional and fictional events. The goals of editing is to manipulate these events for better or for worse communication. It is a visual art....

LCD is a display technology involving optical glass panels whose opacity can be controlled by electrical signals. Each pixel acts as a shutter, to modulate light coming from the lamp that is projected onto the screen. This is a reFlective display technology where one glass substrate is attached to a silicon chip which is coated with Liquid Crystal....

A computer projector is a device that integrates a light source, optics system, electronics and display(s) for the purpose of projecting an image from a computer or video device onto a wall or screen for large image viewing. These devices attached to a computer or video device as you would connect a monitor....

The purpose of the Audio Video Systems design and integration is to meet an applicatin's objective. How well the system is designed dictates how efficiently and effectively this is done. The real benefits of an audiovisual system are highlighted when the whole application is part of an integral system. (LCD, plasma,. projector, speakers, remotes, etc.)

An audio video system is a tool that is used by an organization to meet its goals. A system should complement its users, its environment, and its application....