1.
Acoustics-measurements of reverberation time of theatres
and scoring stages, Methods adopted to control the reverbaration
in theatres and sound scoring stages.
2. Microphones-study of microphones-Directional characteristics
of microphones -Omai directional, Bidirectional - unidirectional
microphones - Polar patterns - Super and Hyper Cardioid-Ultra
directional - Dual pattern microphones - Microphones
impedence - Micro phone sensitivity.
3. Study of Different types of Transitors used in Audio
Amplifiers - R-C coupling - Twostage Amplifier design
consideration - Study of Semi conductor Diodes - Full
- wave Bridge - Rectifiers - Photo - diode and its application
- Photo diode Pre-amplyfier circuits - Transistor class
B Pushpull output stage - Different types of Distortion
in Audio Amplyfiers - Frequency Response of Amplyfiers
- Different types of Oscillators and circuits - Negative
feed back - Transistor Regulated power supply circuits.
4. Net work theory-Dividing networks - combining net
works used in recording mixers.Attenuators-various types
of Attenuators - Equalizers fixed - variable andgraphic
equalizer - parametric equalizers High pass filter low
pass filter- Band repass filter, Design of fixed attenuationpad.
5. Optical recording - the principle of variable area
and density recording - types of variable area tracks
- variable area - light - valve - Galvanometer - Modulators-
Noise Reduction Circuit used in Variable Area recording.
Block diagram of variable area
recording system.
6. Film drive - study of mechanical filters - flutter
measurements - compression and limiting circuits employed
in recording equipments. Recording systemmeasurements
- power level gain level-distortion level-quality control
of variable area sound tract Intermodulation and cross
modulation tests.
Magnetic recording - Theory of magnetic-DC bias recording
AC bias recordingtransfer characteristic-recording and
replay.
Study of record replay and erase heads. Azimuth alignment.Physicaltract
dimension- Synchronous and non-
synchronous magnetic recording equipments.
7. Film reproduction - Standard reproduction Characteristics
Scaning losses Photo Diode coupling methods - Theatre
amplifier characteristics - Loud speaker system used,
cross overnet work and its characteristic.
The component parts of an In-Line recording console
- along with its equalizers and Effects, Echo-delay
chambers.
Practice in using Professional Sync-Recorders, Transfer
process from 1/4" and 35 mm magnetic tape to optical
film
Pre-scroing
and post synchronising
Use
of test films:-
a Buzztract
b Azimuth alignment film
c Frequency film and
d Focussing film
Modern
trend in motion picture recording
a stereophonic sound
b Perspective sound. Special motors used in film recording
and reproduction - Governor controlled, synchronous
and inter lock types
8 Use of different types of measuring instruments:
a Multimeters
b VTVM
c Output metres
d Cathode ray
e Oscilloscopes
Measuring
Instruments:-
1
Study of Motors having different sensitivity and its
effect on the
circuit under measurement.
2 Construction of multi-meters and how to use them for
measuring voltage, current, resistance.
3 Using audio oscillators to determin in the frequency
response of audio amplifiers.
4 Use of cathode ray oscilloscope in checking the performance
of amplifiers.
Audio
amplifiers Characteristic curve of resistance-capacity
coupled inductance coupled and transformed coupled amplifier
construction of audio amplifiers - Push pull amplifiers
- Measurement of gain and frequency response of amplifiers
with and without feed back. Study of the effect of tone
controls. Construction of cathodes follower amplifiers
- Tracing and localising the troubles in amplifiers.
Practice in using Professional sync 1/4" recorders
and recording, checking the frequency response of different
types of magnetic recording equipment.Determination
of bias current-Azimuth adjustments of recording and
reproducing head.
Practice in film recording - Dialogue recording - music
recording. Dubbing re- recording - mixing in practice.
Projection - Film splicing - Bud joints - Film checking
and packing.
9. Study of projector mechanism.
Shutter adjustments - replacement of maltese cross and
sprocket.
Adjustment of idler-rollers, guide rollers, pad rollers
and gate tension.
Refocussing of optical in projector. Instafllation and
maintenance of projectionequipments. Study of change
over system. Different types of wide screen Techniques
and its Aspect Ratios. Study of screens and measuring
screen illumination. Study of Digital Theatre System
and its reproduction process.Safety precautions - Fuses
earthings and other devices. Electrical lay out and
wiring of theatres, studios and projection cabines.
10. Digital integrated circuits - The Binary System
- Binary logic gates - Transistor as a Binary device
- Basic transistor logic gate circuits - Flip - Flops
circuits, (Threshold voltage - Fan in-Fan out - operating
temperature - Power dessipation - operating speed)
DTL Circuit - TTL circuits and ECL circuit wave shaping
circuits -Multi- Vibrators - Bi-stable - Mono-Stable
- Digital to analogue conversion - Analogue to Digital
conversion - uses of Digital Audio Tapes and Digital
Audio Recorders.
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