1. PA and Sound Reinforcement System
August, 2019
By : Engr. Alo Oluwagbenga MNSE, MNIEEE
(Assistant Chief Engineer, NTA Headquarters, Abuja)
Phone:

2. OVERVIEW OF PRESENTATION
Definition of Terms
Considerations For PA
Components of PA system
The Signal Flow
The Set up

3. PUBLIC ADDRESS SYSTEM
Public Address Systen is an sound processor and distribution system with a microphone,, amplifier and a transducer(loudspeakers), used to allow a person to address a large public. Basically for speeches.

4. PUBLIC ADDRESS SYSTEM

5. PUBLIC ADDRESS SYSTEM
Public Address Systen is an electronic sound amplification and distribution system with a microphone, amplifier and a transducer(loudspeakers), used to allow a person to address a large public.

6. Sound reinforcement SYSTEM
This is the combination of microphones, signal processors, amplifiers, and loudspeakers in enclosures all controlled by a mixing console that makes live sound(Vocals and musical equipments) or pre-recorded audio materials sounds louder and may also distribute those sounds to a larger or more distant audience via loud speakers in the form of sound.

7. Sound reinforcement system
It is a functional arrangement of electronic components designed to amplify sound(speech, music, from other musical equipment) To reinforce a sound is to enhance or to give sound more power. The difference between PA system and Sound reinforcement is that PA is simple and it is only for speeeches, but Sound Reinforcement more elaborate(i.e has more components ) used for singing, music , speeches and reinforcement of sound sources.

8. PA SYSTEM BASIC COMPONETS

9. Block diagram

10. Sound reinforcement SYSTEM

11. CONSIDERATIONS & REQUirement
Room Size & Acoustics
Number of People & Location
Speaker Placements
Inputs
Mixing Console needs to sound realistic
Equaliser
Amplifiers
Speakers
Headphone

12. Room size & acoustics
Before you set up any audio system, you need to consider the environment it will be in. Does the room have hard surfaces that can reflect the sound? (i.e. sheetrock walls, glass windows, tiled floors, wooden pews, vaulted hardwood ceilings or a metal roof with beams and columns) Perhaps it’s filled with stuff that absorbs sound like heavy drapes, carpeting, and padded chairs. It’s not that one environment is better than another, but what type of room most suitable.

13. Position of speakers

14. Stereo speaker pair coverage

15. Stereo speaker pair coverage

16. Number of people & Location
For a seats hall, the required skill to set-up a the sound system will be less than it would be for 2,000 seat mega-hall. The equipment needed to cover a small space is typically less difficult to connect and operate. The same applies for an enclosed space or an open air space.

17. Mixer amplifier

18. COMPONENTS of pa system
The Microphones(wired/wireless)
The Instruments/Equipment
The Audio Mixer/ Console
The Cables
The Snake
The Sound processors
The Amplifiers
The Loud Speaker

19. AUDIO MoNITORING
Headphones-These are used to monitor audio more closely. Without it you can’t hear the problems you need to prevent. It can be really helpful to check your audio on multiple sources. A quality set of headphones will help you hear details.

20. HEADPHONES

21. equipment Rack unit-sound processors

22. snake cable

23. speakon cable

24. amplifier

25. speakers-subwoofer

26. Speakers-mid range speakers

27. SOUND SETUP-amplifiers etc