Method for automatically equalizing a sound system

A sound system, equalization technology, applied in stereo systems, quasi-stereo systems, transducer circuits, etc., can solve problems such as unsuitable motor vehicle applications

Active Publication Date: 2007-10-10
HARMAN BECKER AUTOMOTIVE SYST
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Problems solved by technology

This technology is thus not currently suitable for motor vehicle applications for reasons of cost and availability

Method used

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  • Method for automatically equalizing a sound system
  • Method for automatically equalizing a sound system
  • Method for automatically equalizing a sound system

Examples

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Embodiment Construction

[0038] The examples below describe the steps and studies used to create an algorithm according to the invention, eg for automatic adjustment of the equalization filter, also called AutoEQ in the following. Two steps as well as a sequential method and a method considering the maximum separation between the measured rank distribution and a predetermined objective function are studied and they will be disclosed in detail below. The obtained results are used to derive the method, which is used for automatic equalization, that is, without any manual influence on the parameters involved. The main tonal sensitivities considered in this context, including the psycho-acoustic parameters of human perception of sound, are localizability, pitch and staging.

[0039] In this case, the localization capability, which is also called localization, indicates the perceived location of an auditory event eg produced by the superposition of stereophonic signals. The tone is produced by the tempora...

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Abstract

A Method for adjusting a sound system to a target sound, wherein the sound system having at least two groups of loudspeakers supplied with electrical sound signals to be converted into acoustical sound signals; said method comprising the steps of: sequentially supplying each group with the respective electrical sound signal; sequentially assessing the deviation of the acoustical sound signal from the target sound for each group of loudspeakers; and adjusting at least two groups of loudspeakers to a minimum deviation from the target sound by equalizing the respective electrical sound signals supplied to said groups of loudspeakers.

Description

technical field [0001] The invention relates to a method for automatic equalization of a sound system. Background technique [0002] In the past, sound optimization of dedicated systems such as motor vehicles was usually done manually. Although considerable efforts have been made in the past to automate this manual process, these methods, such as the Cooper / Bauk method, have shown weaknesses in practice. In small highly reflective areas, such as the interior of a car, there is generally no improvement in acoustics. In most cases, the result could be worse. [0003] To date, considerable effort has been devoted to analyzing and correcting these deficiencies. Methods of equalizing acoustic poles and acoustic nulls that co-occur at different listening positions (CAP methods) are worth noting, or those that try to use e.g. MELMS ( Multiple Error Least Mean Square (Multiple Error Least Mean Square) algorithm to achieve equalization. Spatial filters or smoothing methods such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00H04R3/00
CPCH04S7/301H04R2499/13H04S5/00H04S5/02H04S3/00
Inventor M·克里斯托夫L·舍尔茨
Owner HARMAN BECKER AUTOMOTIVE SYST
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