Monday, 12 May 2014

Syllabus Topics

Architectural Acoustics
Classification of Sound : Loudness – Weber Fechner law - Decibel – Absorption Coefficient – Reverberation – Saline’s formula – Factors affecting acoustics of buildings and their remedies.



Ultrasonic
Introduction, production, properties and detection of ultrasonics. Determination of velocity and application of ultrasonic in Engineering.



Crystal Physics
Introduction and classification of solids-crystal structure – The crystal systems and Bravias Lattice – Space Lattices of cubic systems – Miller Indices – Relation between Interplanner Distance and cubic Edge and Laws Formula.



Band theory of Solids
Based theory of Solids – Classification of solids – Energy band structure of conductors, insulator and semi conductions types of diodes (simple diode, Zener diode, varactor diode, LED Solar cells, photovoltaic cell, Photo Conductivity, Hall effects.



LASERS
Introduction and properties of Lasers, Stimulated and instantaneous emersion – Relation between Ecienstein’s ‘A’ and ‘B’ Coefficients-Population Inversion – Optical – Pumping – Nd-Yag Laser and CO2 Laser – Application of Laser in Material Processing – Holography – Application of Lasers



Optical
Fibre Communication Introduction – Fibre – Optic System – advantages of Fibre optics – Basic principle – Acceptance angle and Numerical Aperture – Types of optics preparation through optical fibre



Conducting Materials
Introduction – conduction in Metals, Electron theory Q.M. treatment – Free electrode theory of metals – Electrical Conductivity – Thermal Conductivity – Wildemann – Franz law – Drawbacks of classical free electrode theory



Super Conducting Materials
Introduction to super conductor – properties of super conductor Type I and Type II super conductor – Comparision between I and II – High T conductors – Application



New Engineering Materials
Introduction – Metallic glasses, types, properties, preparation and its application – Introduction to nano technology – method of producing, properties and its application – shape memory alloys – types – shape Memory effect – Pseudo elasticity – properties – application – Bio-materials – General information – Biomedical compatibly of Ti-Al-Nb alloys for implant application.



Non-Destructive Testing
Introduction – The objective of NDT – Types of Defects – Methods of NDT (Liquid Penetrate – Dye Penetrate Radiographic) x X-ray Radiography – X-ray Fluoroscopy – Ultrasonic Inspection method – Pulse Echo System – Visual Display units.

1.Architectural Acoustics

Architectural Acoustics
Classification of Sound : Loudness – Weber Fechner law - Decibel – Absorption Coefficient – Reverberation – Saline’s formula – Factors affecting acoustics of buildings and their remedies.

  • now we are study about each of the topic and understand what is it.
Classification of sound


firstly what is sound-->Sound is a Vibration In an Elastic Medium With definite Frequency & Intensity.        
• Longitudinal wave . 
• requires a medium . 
• cannot travel in a vacuum.

 @ Now the audible sound have a two classification.
                     1.Musical Sound     2.Noise
Loudness
Weber Fechner law
From this relation it is seen that loudness is directly proportional to the logarithm of intensity and is know as a weber-Fechner law.

Absorption Coefficient

The sound absorption coefficient indicates how much of the sound is absorbed in the actual material. The absorption coefficient can be expressed as: 
α = Ia / Ii        (1)
where 
Ia = sound energy absorbed by the surface  (W/m2)
Ii = total sound energy incident on it (W/m2)
Reverberation

The persistence or prolongation of sound in a hall even though the source of sound is cut off is called reverberation.  

Reverberation Time:-The Time taken by the sound to fall below the minimum audibility level after the source stopped sounding is called reverberation Time.


Sabine’s formula
  


LAST EXAM PAPER STYLE(14-06-2014)