Younes Al-Sayed-Hasan

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Presentation transcript:

Younes Al-Sayed-Hasan 223646 Loud Speakers Younes Al-Sayed-Hasan 223646

Outline The basic principle The main components of the loudspeaker How a Speaker works? Why do we concentrate on the enclosures? Types of Speaker Enclosures Factors determine the quality of the sound generated Conclusion loud speakers

The Basic Principle A loudspeaker is an electromechanical device which converts an electrical signal into sound. Loudspeakers are used in numerous applications from hearing aids to air raid sirens Loudspeakers are the most variable elements in any audio system, and may be responsible for marked audible differences between otherwise identical systems. Microphone Audio Circuit Speaker loud speakers

The Main Components loud speakers

loud speakers

How a Speaker works? loud speakers

Resistance of a speaker Difference between large and small speaker Stereo system loud speakers

Efficiency Definition mathematically physically How to increase it Reduce the cone resistance mass Increase the force Strong magnet loud speakers

Why do we concentrate on the enclosures? Back-to-front Cancellation loud speakers

Why do we concentrate on the enclosures? (Cont.) 2. Coupling Loudspeaker to air It can not produce a sound whose wavelength > its diameter Ex. 8-inch 1700 Hz loud speakers

Types of Speaker Enclosures Closed Box Enclosure loud speakers

Types of Speaker Enclosures (Cont.) Horn loud speakers

loud speakers

Factors determine the quality of the sound generated Size of the room Speaker Placement in the room Is the room empty or not ? loud speakers

Conclusion Magnetic filed plays a main rule of conversion electricity into sound. To choose your speaker, many factors must be considered like size of the room and place of the speaker. By using enclosures, we will avoid 2 problem Back-to-front cancellation Coupling loudspeaker to air loud speakers

References http://hyperphysics.phy astr.gsu.edu/hbase/audio/spk.html Designing, Building & Testing your own Speaker System By David B. Weems loud speakers

Q & A loud speakers