While planning public address systems for sports complexes like stadiums or sports halls, emphasis is put on emergency warning and announcements. Additionally music and commercials are to be played back in good quality. The intention of using the installed systems for concert purposes also increases the requirements to linearity and bottom end reproduction. Even assuming considerable noise levels by the public itself, the systems have to ensure speech intelligibility and high sound pressure levels.
Predominant use of solid, reflective materials like concrete and glass results in long reverberation times, which compromises the speech intelligibility. Often the public provides the only effective absorber. That is why as choice of loudspeakers, only those models come into consideration, that can be focused accurately to the public areas with their even and well-defined directivity, while avoiding extensive dispersion of sound energy to reflective planes. For this, beside traditional horn systems also line arrays are used, whose directional characteristics can be adjusted flexibly to the venue's geometry.
While simulating the complex, positions all over the public areas are being evaluated for achievable sound pressure level and speech intelligibility.
Convolution with the simulated impulse response allows the auralization of any signal:
Audio Sample 1: Auralization Stadium with Line Arrays without Audience
Audio Sample 2: Auralization Stadium with Line Arrays with Audience
Audio Sample 3: Auralization Stadium with Horn Clusters without Audience
Audio Sample 4: Auralization Stadium with Horn Clusters with Audience