Method of determining acoustical characteristics of a room or venue having n sound sources

A method of determining acoustical characteristics of a room or venue having n sound generators or sound sources, comprising the steps of:

• providing a microphone unit having four omni-directional microphones at ends of a tetrahedral mounting unit, which are equidistant to a middle point of the mounting unit,
• detecting impulse responses for each of the n sound generators or sound sources by the four microphones of the microphone unit;
• analyzing the detected impulse responses in view of direct sound components by determining a direction, a delay, and a frequency response for each direct sound component;
• analyzing the detected impulse responses in view of m early reflection components by determining a direction, a delay, and a frequency response for each of m early reflections;
• analyzing the detected impulse responses in view of late reverberation components by determining a delay and a frequency response for each late reverberation component;
• calculating direct-sound filter parameters for a direct sound transmission function filter based on the determined directions, delays, and frequency responses of the direct sound components;
• calculating early-reflection filter parameters for m early reflection transmission function filters based on the m determined directions, delays, and frequency responses of the m early reflection components;
• and
• calculating late-reverberation filter parameters for a late reverberation transmission function filter based on the determined delays and frequency responses of the late reverberation components.