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Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance

5 Chapters
|
28 Pages
|
3,745 Words
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Electrical Electronics Engineering

Complete Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance Project Materials (Chapters 1 to 5):

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

TABLE OF CONTENT

Certificate
Title Page
Approval Page
Dedication
Acknowledgement
Abstract
Table Of Contents

 

Chapter One
1.0 Introduction

1.1 Electromagnetic Principle

Chapter Two
2.0 Literature Review

2.1 Piezoelectric Principle
2.2 Electrostatic Principles

Chapter Three
3.0 System Design

3.1 Loud -Speaker As Electro-Acoustic Machines
3.2 Electric Circuit Equation
3.3 Energy Conversion
3.4 Working Principles Of A Loudspeaker
3.5 Filter Circuit Coupled Into Loudspeaker

Chapter Four
4.0 Implementation Testing And Result Implementation

4.1 Testing And Result

Chapter Five
5.0 Cost Analysis

5.1 Problems Encounter
5.2 Recommendation
5.3 Conclusion
References

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.

ELECTROMAGNETIC PRINCIPLES
The vast majority of modern disc pickup utilize the electromagnetic principles whereby vibration imparted to the stylus as a result of its tracing the groove wall modulation (wriggle) result in magnetic flux changes relative to a coil of wire.
A signal E.M.F is thus induces into the winding and a signal voltage corresponding to the original signal information is developed across it. This of course is the dynamo effect which was discussed in chapter 1
The groove of a disc record of a v-shaped cut and for stereo one wall is modulated with the left signal and the other with the right signal. Thus a stereo pickup has two generating systems one yielding the left signal and the other the right signal the design being such that minimal interactions and hence cross talk occur between the two channels.
Reader requiring more information on this technique called the 45/45 technique of stereo recording may find the authors the audio handbook of interest also published by Newnes Butter worth’s.
Many microphone also adopt the electromagnetic principle. In this case a law-mass diaphragm is coupled to the electromagnetic system and as the diaphragm vibrates in the presence of sound waves so a corresponding signal voltage is developed across the winding. Some stereo microphone employ two such generator in a common housing so that axis of one is at right angle to that of the other.
The electromagnetic principle of microphones is exemplified by the moving coil arrangement where a coil of wire free to more in a strong magnetic field is secured to the center of the diaphragm. As the diaphragm vibrates so the turn of the coil cut the magnetic lines of force and a signal voltage corresponding to the information carried by the sound waves is developed across the winding.

Many loudspeaker use the moving coil principle but in the reciprocal sense that is signal current (after the programme signal has been significantly boosted by power amplification) is caused to flow through the coil. The resulting magnetic field which is changing in accordance with the programme signal reacts against the fixed magnetic in which the coil is suspended. The coil thus vibrates within the fixed field and carrier the diaphragm or cone with it hereby producing sound waves

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Project Structure

The introduction of Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance should start with the relevant background information of the study, clearly define the specific problem that it addresses, outline the main object, discuss the scope and any limitation that may affect the outcome of your findings

Literature Review of Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance should start with an overview of existing research, theoretical framework and identify any gaps in the existing literature and explain how it will address the gaps

Methodology of Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance should describe the overall design of your project, detail the methods and tools used to collect data explain the techniques used to analyse the collected data and discuss any ethical issues related to your project

Results should include presentation of findings and interpretation of results

The discussion section of Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance should Interpret the implications of your findings, address any limitations of your study and discuss the broader implications of your findings

The conclusion of Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance should include summarize the main results and conclusions of your project, provide recommendations based on your findings and offer any concluding remarks on the project.

References should List all the sources cited in Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance project by following the required citation style (e.g., APA, MLA, Chicago).

The appendices section should Include any additional materials that support your project (Construction Of CD Speaker Double Magnet Of Six And Half Inches Diameter 150 Watts 18 Impedance) but are too detailed for the main chapters such as raw data, detailed calculations etc.