April 12, 2010

EC1023 ENGINEERING ACOUSTICS SYLLABUS B.E. ELECTRONICS AND COMMUNICATION ENGG. ANNA UNIVERSITY CHENNAI


ANNA UNIVERSITY CHENNAI :: CHENNAI 600 025 CURRICULUM 2004
B.E. ELECTRONICS AND COMMUNICATION ENGINEERING
FIRST YEAR – ANNUAL PATTERN
(Applicable to the students admitted from the Academic year 2006-2007 onwards)
LIST OF ELECTIVES FOR B.E. ELECTRONICS AND COMMUNICATION ENGG.
SEMESTER VIII

EC1023 ENGINEERING ACOUSTICS

AIM
This course aims at providing an overview of engineering acoustics.

OBJECTIVE
• To provide mathematical basis for acoustics waves
• To introduce the concept of radiation reception absorption and attenuation of acoustic waves.
• To present the characteristic behaviour of sound in pipes, resonators and filters.
• To introduce the properties of hearing and speech
• To describe the architecture and environmental inclusive of reverberation and noise.
• To give a detailed study on loud speakers and microphones.

UNIT I 9
Acoustics waves – Linear wave equation – sound in fluids – Harmonic plane waves – Energy density – Acoustics intensity – Specific acoustic impedance – spherical waves – Describer scales.
Reflection and Transmission:
Transmission from one fluid to another normal and oblique incidence – method of images.

UNIT II RADIATION AND RECEPTION OF ACOUSTIC WAVES 9
Radiation from a pulsating sphere – Acoustic reciprocity – continuous line source - radiation impedance - Fundamental properties of transducers.
Absorption and attenuation of sound
Absorption from viscosity – complex sound speed and absorption – classical absorption coefficient

UNIT III PIPES RESONATORS AND FILTERS 9
Resonance in pipes - standing wave pattern absorption of sound in pipes – long wavelength limit – Helmoltz resonator - acoustic impedance - reflection and transmission of waves in pipe - acoustic filters – low pass, high pass and band pass.
Noise, Signal detection, Hearing and speech
Noise, spectrum level and band level – combing band levels and tones – detecting signals in noise – detection threshold – the ear – fundamental properties of hearing – loudness level and loudness – pitch and frequency – voice.

UNIT IV ARCHITECTURAL ACOUSTICS: 9
Sound in endosure – A simple model for the growth of sound in a room – reverberation time - Sabine, sound absorption materials – measurement of the acoustic output of sound sources in live rooms – acoustics factor in architectural design.
Environmental Acoustics:
Weighted sound levels speech interference – highway noise – noise induced hearing loss – noise and architectural design specification and measurement of some isolation design of portions.

UNIT V TRANSDUCTION 9
Transducer as an electives network – canonical equation for the two simple transducers transmitters – moving coil loud speaker – loudspeaker cabinets – horn loud speaker, receivers – condenser – microphone – moving coil electrodynamics microphone piezoelectric microphone – calibration of receivers.

TOTAL : 45
TEXT BOOKS
1. Lawerence E.Kinsler, Austin, R.Frey, Alan B.Coppens, James V.Sanders, Fundamentals of Acoustics, 4ht edition, Wiley, 2000.
REFERENCES
1. L.Berarek , “Acoustics” - McGraw-Hill


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