Patent ID: 8559661

Claim:
A sound system for producing sound comprising: a first audio driver configured to emit a first audio signal in response to a first drive signal, the first audio signal having a first on-axis direction; a second audio driver configured to emit a second audio signal in response to a second drive signal, the second audio signal having a second on-axis direction, an angle between the first on-axis direction and the second on-axis direction being higher than 90°; a third audio driver configured to emit a third audio signal in response to a third drive signal, the third audio signal having a third on-axis direction, an angle between the first on-axis direction and the third on-axis direction being higher than 45°, and an angle between the second on-axis direction and the third on-axis direction being higher than 45°; a first driving unit configured to generate the first drive signal for the first audio driver from a first driving unit input signal, wherein the first driving unit and the first audio driver together comprise a first driving path with an associated first transfer function having a first phase response; a second driving unit configured to generate the second drive signal for the second audio driver from a second driving unit input signal, the second driving unit and the second audio driver together comprise a second driving path with an associated second transfer function having a second phase response; and a third driving unit configured to generate the third drive signal for the third audio driver from a third driving unit input signal, the third driving unit and the third audio driver together comprise a third driving path with an associated third transfer function having a third phase response, wherein the first driving unit input signal, the second driving unit input signal and the third driving unit input signal comprise at least one common signal component; wherein the first phase response deviates from the second phase response by between 90° and 270° in a frequency interval above a first frequency; and wherein the third phase response of the third transfer function comprises a phase response that varies with a variation, provided in a frequency domain, of a minimum of two transitions between (i) a first phase interval proximal to the first phase response of the first transfer function within the frequency interval above the first frequency and (ii) a second phase interval proximal to the second phase response of the second transfer function within the frequency interval above the first frequency.