Method and apparatus for determining the acoustic spatial characteristics particularly of a vehicle occupant compartment in a motor vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorMike Peters
Life of this patent
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Abstract
The method and apparatus according to the invention determines the acoustic spatial characteristics of an enclosure, particularly of a vehicle occupant compartment in a motor vehicle. A piece of equipment emits a useful sound together with a test sound. By analyzing a recorded analysis sound, the test sound is emitted in a psychoacoustic masking range of the useful sound. Advantageously, the covering range of the useful sound is determined in a useful-sound analysis block before the useful sound and the test sound are emitted.
Claims9
Method for determining acoustic spatial characteristics in a defined space, comprising:
- a piece of equipment emitting a useful sound in said defined space, said useful sound containing aurally detectable information;
- said piece of equipment emitting a test sound in said defined space, concurrently with emission of said useful sound;
- detecting and recording an analysis sound comprising said useful sound and said test sound;
- and
- analyzing said analysis sound;
- wherein the test sound is emitted within a psychoacoustic masking range of the useful sound.
Apparatus for determining acoustic spatial characteristics in a defined space, said apparatus comprising:
- a device for emitting in said defined space a useful sound containing aurally detectable information;
- a device for determining a psychoacoustic masking range of said useful sound;
- apparatus for emitting a test sound in said defined space, concurrently with emission of said useful sound, said test sound falling within said psychoacoustic masking range;
- and;
- apparatus for detecting, recording and analyzing an analysis sound comprising said useful sound and said test sound.
A method for determining acoustic spatial response characteristics in a defined space, to useful sound that is generated by a sound generating apparatus and contains aurally detectable information, said method comprising:
- analyzing said useful sound to determine a psychoacoustic masking range thereof;
- causing said sound generating apparatus to emit a test signal within said psychoacoustic masking range, together with the useful sound, said test signal being inaudible to human perception;
- detecting sound generated by said sound generating apparatus, including said useful sound and said test signal;
- and
- analyzing detected sound to determine said acoustic spatial response characteristics.
Apparatus for determining acoustic spatial response characteristics of a defined space, to a useful sound that is generated by a sound generating apparatus and contains aurally detectable information, said method comprising:
- a transducer for detecting sound generated by said sound generating apparatus;
- a sound analysis block coupled to receive an output of said transducer, for analyzing detected sound, said sound analysis block containing apparatus for determining a psychoacoustic masking range of said useful sound;
- apparatus for causing said sound generating apparatus also to generate a test signal within said psychoacoustic masking range, together with said useful sound, said test signal being inaudible to human perception;
- means for separating said test signal from said useful sound contained in an output of said transducer;
- and
- means contained in said sound analysis block for analyzing said test signal to determine said acoustic spatial response characteristics.
Dependencies are inferred from the claim text.