VISVESVARAYA TECHNOLOGICAL UNIVERSITY
″JNANASANGAMA″, BELAGAVI-590018
Technical Seminar Report on
(15ECS86)
‘Audio Spotlighting’
Submitted in partial fulfilment of 8th semester of
BACHELOR OF ENGINEERING
In
TELECOMMUNICATION ENGINEERING
Submitted By
Suraj R Rao
1MV15TE057
Under the Guidance of
Dr. E. Kavitha
HOD, Dept. of TCE
.
DEPARTMENT OF TELECOMMUNICATION ENGINEERING
SIR M. VISVESVARAYA INSTITUTE OF TECHNOLOGY
(Affiliated to Visvesvaraya Technological University, Belagavi)
International Airport Road, Hunasamaranahalli, Yelahanka,
Krishnadevaraya Nagar, Bengaluru, Karnataka 562157
Year 2018-2019
SIR M. VISVESVARAYA INSTITUTE OF TECHNOLOGY
DEPARTMENT OF TELECOMMUNICATION ENGINEERING
Year 2018-2019
CERTIFICATE
Certified that the Technical Seminar (15ECS86) on “Audio Spotlighting” prepared by Suraj R
Rao (1MV15TE057), a bonafide student of SIR M. VISVESVARAYA INSTITUTE OF
TECHNOLOGY. The report is in partial fulfillment of the 8th semester of BACHELOR OF
ENGINEERING in Telecommunication Engineering, of Visvesvaraya Technological
University, Belagavi during the year 2018-2019. It is certified that all corrections/suggestions
indicated for the Internal Assessment have been incorporated in the report deposited to the
departmental library. The seminar report has been approved as it satisfies the academic
requirements in respect of work prescribed for the said Degree.
________________
Signature of Internal Guide
Dr. E. Kavitha
______________
______________
Signature of HOD
Signature of Principal
Dr. E. Kavitha
Dr. V.R. Manjunath
HOD, Dept. of TCE
HOD, Dept. of TCE
Sir. MVIT, Bengaluru.
Sir. MVIT, Bengaluru.
Principal
Sir. MVIT, Bengaluru.
ACKNOWLEDGEMENT
A seminar is incomplete if it fails to thank all those instrumental in the successful completion of
the project.
We express our deep sense of gratitude to our principal Dr. V.R Manjunath who provided us
with an opportunity to fulfill our desired goal.
We whole-heartedly we express our sincere thanks to our beloved Head of the Department, Dr.
E. Kavitha. We are thankful to our internal guide Dr. E. Kavitha, Head of the Department,
Department of Telecommunications Engineering for their continuous guidance and valuable
inputs throughout the duration of our seminar.
We also extend our gratitude to our parents, staff of TCE and our friends for their moral support
and their encouragement, which motivated towards successful completion of seminar work.
Suraj R Rao
1MV15TE057
TABLE OF CONTENTS
Chapter 1: INTRODUCTION……………………………………………………………1
Chapter 2: LITERATURE SURVEY…………………………………………………….2
Chapter 3: TECHNOLOGY OVERVIEW………………………….................................5
Chapter 4: PROPOSED SYSTEM……………………………………………………….7
Chapter 5: APPLICATIONS…………………………………………………………….10
Chapter 6: ADVANTAGES……………………………………………………………...13
Chapter 7: CONCLUSION………………………………………………………………14
Chapter 8: REFERENCES ………………………………………………………………15
TABLE OF FIGURES
FIG 3.1: Comparison of conventional speaker and audio spotlight……………………. 5
FIG 3.2: Dispersion of sound beam……………………………………………………. 6
FIG 3.3: Range of hearing……………………………………………………………… 6
FIG 4.1: Block diagram of audio spotlight system……………………………………....7
FIG 4.2: Audio spotlight emitter…………………………………………………………8
FIG 4.3:Directivity…………………………………………………………………….…9
FIG 4.4:Computer simulation of sound beam……………………………………………9
FIG 5.1: Audio Spotlighting in a car………..…………………………………………..10
FIG 5.2: Audio Spotlighting in a museum……...……………………………………….10
FIG 5.3: Audio Spotlighting in a pro-active space………………………………………11
FIG 5.4: Audio Spotlighting in a commercial facilities…………………………………12
ABSTRACT
Audio Spotlighting, as the concept is called, is an application of smart directional and localized
audio technology, where the playback of sound can be spatially confined. That is, sound broadcast
from the system would be bounded to a specific portion of a wider space, and inaudible elsewhere.
The ability to listen to any audio content, while others around enjoy silence or their own program
of choice is an attractive prospect—thus far, generally, achieved by wearing headphones. With such
a system it would ideally be possible to arrange completely independent listening conditions in
closely adjacent positions, such as on different sides of a table or in different parts of a room. Such
a system could be used, for example, to create location-specific audio advertisements in a shopping
mall, where background noise would efficiently mask the leaking sound. It uses a non-linear
acoustics for its working. This acoustic device comprises a speaker that fires inaudible ultrasound
pulses with very small wavelength which act in a manner very similar to that of a narrow column.
The ultra sound beam acts as an air borne speaker and as the beam moves through the air gradual
distortion takes place in a predictable way due to the property of non-linearity of air. This gives rise
to audible components that can be accurately predicted and precisely controlled.