Proposal of a Sound System
AUD407 Advanced Audio System Design

Table of Contents Overview 3 Site Assessment 4 Environmental Analysis 5 System Design Requirements 5 The System 8 Figure 1: Line Array Configuration 8 Figure 2: Jsub Frequency Map 9 Figure 3: Line Array Analysis 10 Foldback 12 Figure 4: Foldback Speaker Placement 12 Mixer/Desk 13 Signal Flow 13 Sound Reinforcement Analysis 14 “Rock” Band 14 Choir 14 FOH 14 Amp 15 Foldback 15 Stage Box/Mixer 15 Overall Equipment List 16 Power 19 Figure 5: Power Distribution 19 Watts Per Person FOH (peak) 20 Conclusion 20 Bibliography 21 APPENDIX 22

Overview
The event in which this proposal is catered for is a ‘carols by …show more content…
Finally, the loudspeaker angle are splayed evenly relative to the grounds dimensions, this allows for all audience members to receive and enjoyable, even level of sound whilst also maintain a tight spread that will not exceed the noise level regulations of the events location.

Figure 2: Jsub Frequency Map

Figure 2 shows ArrayCalc’s (D&B Audiotechnik, 2010) proposed frequency spread of the 2 Jsub’s evenly spaced on each end of the stage. Unfortunately this doesn’t incorporate the Jsub’s adoring the digital array system (represented by the black squares). If these were implemented in the above calculations, one would assume an even spread of low frequencies across the board.

Figure 3: Line Array Analysis

Figure 3 displays the acoustic spread of the proposed configuration.
From the above data (all figures) we can assume the following: * All audience members are subject to audible sound at a level above 100dB. * A relatively even frequency spread. * No misdirected sonic energy. * A listening ‘sweet spot’ at around 50meters. Perfect for the FOH engineer to maintain a quality mix. * Fills (Q1) provide audio for audience member not in the acoustic path of the DVA. * Good low frequency cover.
One must remember that despite a peak of 128dB at 15meters in figure 3, this is a ‘peak’ not an average SPL level. It is up to the FOH engineer to provide safe and even mix prior to the event at sound