CONSTRUCTION OF CD SPEAKER DOUBLE MAGNET OF SIX AND HALF INCHES DIAMETER 150 WATTS 18 IMPEDANCE (ELECTRICAL AND ELECTRONICS ENGINEERING PROJECT TOPICS)
Abstract
The project work on construction of loud speaker involves some critical research and study concerned electromagnetic induction effect in transducers like loud speaker and its associated parameter required to chose a very good one this parameters are the power rating of loud speaker and the coil. The sizes were also put into consideration. During the packaging of the loud speaker box a signal conditioning R.C network was build and coupled into the system which take care of the treble and bass boss for the entire speaker signal output
Chapter One
1.1 INTRODUCTION
The microphone and disc pickup generate programme signals and the loudspeaker changes them back to sound so that they can be heard most programme materials starts as sound waves so the first link in the broadcasting chain is generally the microphone. This changes the sound waves to weak electrical signal which are the programme signals. After suitable amplification and processing the signals are fed either to the transmitter for direct broadcasting or to a magnetic tape recorder for storing and subsequent broadcasting or for disc record making the programme information stored in the groove spiral of a disc records in the form of wriggles is changed back to programme signal whenever required by the disc pickup which consists of a pickup cartridge and arm combination.
The cartridge which is equipped with a stylus for tracing the groove spiral is flitted to the end of the arm (usually in a headshell) while the other end of the arm is commonly pivoted such a way as to allows the cartridge to traverse the record with the very minimum of friction.
The microphone disc pickup and loudspeaker are called transducer because they change sound to signal or signal to sound. Several principles can be used for the transuding effect the three most common ones being electromagnetic piezoelectric and electrostatic.
