Electro Acoustical Sound System Guide - PowerPoint PPT Presentation

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Electro Acoustical Sound System Guide

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Title: Electro Acoustical Sound System Guide


1
Electro Acoustical Sound System Guide
  • Presented by eng. Kiril Yanev
  • studiobalkandji_at_gmail.com
  • 0888 393278

2
Loudspeakers
  • Electro-dynamic
  • Electro-static
  • Ribbon

3
Loudspeaker Enclosures
  • Closed box
  • Vented box
  • Horn
  • others
  • (Baffle,
  • Transmission line)

4
Parameters of the loudspeakers
Input Connections Screw Terminal
Frequency Response (-10 dB) 50 - 20,000 Hz
Internal Crossover Yes
Sensitivity 1 W/1 m 99 dB
Max. SPL/1m (calc) 129 dB
Coverage (Nominal -6 dB) H 60/110 long throw/short throw
Coverage (Nominal -6 dB) V 70/90 long throw/short throw
System Power Handling (Continuous/Program/Peak) 250/500/1000 Watts
LF Transducer 12-inch
HF Transducer 1.25-inch DH3/2010A compression driver (1-inch exit)
Crossover Frequency 2000 Hz
Nominal Impedance (Passive) 8 O
  • power
  • sensitivity
  • impedans
  • directivity
  • others

5
Parameters of the amplifiers
Amplifier Gain 32 dB
Continuous Rated Power (1 kHz, THD 1) 4? 1100 Watts
Continuous Rated Power (1 kHz, THD 1) 8? 600 Watts
Crosstalk lt lt -80 dB at 1,000 Hz
Frequency Response 15 - 40,000 Hz
Impedance 2/4/8 ?
Input Impedance (Balanced) 20 kO
Input Sensitivity 5.8 dBu
Intermodulation Distortion (SMPTE) lt 0.02
Signal-to-Noise Ratio (A-weighted) 107 dB
Slew Rate 35 V/µs
Topology Class-H
Total Harmonic Distortion lt 0.05
  • power
  • sensitivity
  • voltage gain
  • others
  • Choosing the right amplifier
  • (100V, low impedance)

6
Power amplifiers 100 V line
  • Amplifiers output Is connected to step-up
    transformer. Every speaker part of the line has
    step-down transformer. The principle is the same
    as high voltage power distribution lines.

7
Grouping the loudspeakers
  • Conventional loudspeakers

8
Grouping the loudspeakers
  • Sound column
  • Little space between transdusers gt good HF
    response
  • Long length of the line gt good LF directivity

9
Grouping the loudspeakers
  • Groupped conventional loudspeakers
  • line array system

10
Sound System Guide - Halls
  • Small installation single center loudspeaker
  • Small Hall
  • Small Church
  • School
  • Classroom
  • Presentations

11
Sound System Guide - Halls
  • Small installation left/right loudspeaker
  • mono subwoofer ????????? ?? ????? ????
  • Small church
  • School
  • Concert Hall
  • Presentations

12
Sound System Guide - Halls
  • Small installation - 5.1 surround
  • Small hall
  • School cinema
  • Presentations

13
Sound System Guide - Halls
  • Small installation distributed ceiling
  • speakers (100V)
  • Exhibition
  • Ballroom
  • Conference hall

14
Sound System Guide - Halls
  • Small installation distributed ceiling
  • speakers (100V)
  • Exhibition
  • Ballroom
  • Conference hall

15
Sound System Guide - Halls
  • Medium installation central cluster with
    additional infills and balconfills
  • Presentations
  • Conference hall

16
Sound System Guide - Halls
  • Medium installation corridor type with several
  • delay lines
  • Evangellist church
  • Conference hall
  • Long halls

17
Sound System Guide - Halls
  • Medium installation with several
  • groups of loudspeakers
  • Conference hall
  • University hall
  • Suitable for wide halls

18
Sound System Guide - Halls
  • Medium installation sound column
  • airports
  • Conference hall
  • Shopping malls
  • Suitable for reverberant spaces

19
Sound System Guide - Halls
  • Medium install bar/disco with
  • multiple zondes
  • Discos
  • Caffe
  • Bars

20
Sound System Guide - Halls
  • Big installation - hall
  • Conference hall
  • Multifunctional hall

21
Sound System Guide - Halls
  • Big installation - theatre
  • (groups of loudspeakers with special
    functionallity)
  • Drama theatres
  • Multifunctional halls

22
Sound System Guide - Halls
  • Big installation - line array
  • Concert hall
  • Arena
  • Long halls

23
Sound System Guide - Cinema
  • Acoustical requirements
  • RT60 (500Hz)lt0,8s
  • Deviation from RT60 (500Hz) for other frequencies
    according to Dolby standart

24
Sound System Guide Cinema
  • Acoustical requirements
  • Without first reflections (difference from
    concert halls)
  • Noise level NC30-NC35
  • Sound proofing

25
Sound System Guide - Cinema
  • Screen Loudspeakers
  • They must provide 105dB SPL at ? of the length of
    the hall
  • (simultanious work of the three channels provide
    approx 5dB more)

26
Sound System Guide - Cinema
  • Screen loudspeakers

27
Sound System Guide - Cinema
  • Surround loudspeakers
  • number 12-16 (4 on the rear wall, 3-4 on the
    side walls)
  • minimum (for small halls) 8 (2 on the rear wall,
    3 on the side walls)
  • directions first row of surrounds at ? from the
    rear wall
  • last row at minimum 2-3 meters from the rear
    wall

28
Sound System Guide - Cinema
  • Subwoofers
  • Use of 18 speakers
  • number one piece on every 675 cubic meters
  • Always round-up to a bigger number
  • Sometimes is appropriate to put more, just for
    bigger effect

29
Sound System Guide - Studio
  • TV and Radio Studio
  • Hard requirements for noise (NC20-NC25)
  • Functional scheme of Sound Recording Studio
  • 1. Control room
  • 2. Live room
  • 3. Dead room (voicover, vocals)
  • 4. Machine room
  • 5. Room for relax

30
Sound System Guide - Studio
  • Sound recording studios (acoustics of the control
    room)
  • RT60 0,2-0,4s
  • Without first reflections (Reflection Free Zone
    gt20ms)
  • Control of the standing waves (Bass Traping)
  • LEDE (live end-dead end)

31
  • Thanks for your attention!!!
  • studiobalkandji_at_gmail.com
  • 0888 393278
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