Method of performing measurements by means of an audio system comprising passive loudspeakers

Method of performing measurements by means of an audio system comprising passive loudspeakers, whereby said measurements are performed by using at least one of said loudspeakers for producing sound and at least one of said loudspeakers for measuring said sound, whereby said method comprises analysing said measurements for determining spatial information, whereby said spatial information comprises an acoustical image of the surroundings of said audio system, whereby room modes of said surroundings are determined from said measurements, whereby an equalization target response is established on the basis of both a loudspeaker coloration response and said room modes.

Method of performing measurements by means of an audio system comprising passive loudspeakers, whereby said measurements are performed by using at least one of said loudspeakers for producing sound and at least one of said loudspeakers for measuring said sound, whereby a set of equalization target responses for improving the tonal balance of an audio system in a room, said audio system comprising at least N passive loudspeakers, N being at least two, is established by performing the steps of:

• determining, for P combinations of loudspeaker pairs in said audio system, the speaker-room-speaker response for a test signal provided to a loudspeaker of said loudspeaker pair and captured by the other loudspeaker of said loudspeaker pair, said other loudspeaker operating as a microphone, P being equal to or larger than N,
• establishing N equalization target responses on the basis of said P speaker-room-speaker responses, said N equalization target responses corresponding to said N loudspeaker channels of said audio system.

Method of determining a set of loudspeaker coloration responses for at least one out of N passive loudspeakers, whereby said loudspeaker coloration responses are determined by analysing measurements performed by using at least one of said loudspeakers for producing test sound and at least one of said loudspeakers for measuring said test sound, whereby an equalization target response for a loudspeaker is established on the basis of said loudspeaker coloration responses.

Audio system comprising N passive loudspeakers, wherein said audio system further comprises an output stage where each output acts as a combined output channel and a measurement input, wherein said audio system comprises means for performing measurements by using at least one of said loudspeakers as a microphone, wherein said measurements comprise impulse responses, and wherein said measurements comprise speaker-room-speaker responses.

Method of determining a set of loudspeaker coloration responses for at least one out of N passive loudspeakers, whereby said loudspeaker coloration responses are determined by analysing measurements performed by using at least one of said loudspeakers for producing test sound and at least one of said loudspeakers for measuring said test sound, whereby said loudspeaker coloration responses are determined by analysing an equation system based on said measurements.