US 2025/0267404 A1Published application

Microphone arrangement

AssigneeHarman Becker Automotive Systems GmbH

InventorsViktor DOBOS, Balazs VARGA, Daniel HAJDU, Darin KRAJEWSKI, Rego SZILAGYI

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Abstract

A microphone arrangement comprises an omnidirectional microphone providing a first microphone output signal (s1[n]), a unidirectional microphone providing a second microphone output signal (s2[n]), a first filter unit and an adder configured to provide a microphone arrangement output signal (sout[n]) by summing a filtered first microphone output signal (s1′[n]) and either the second microphone output signal or a filtered second microphone output signal (s2′[n]) provided by a second filter unit. The first filter unit removes the mid-frequency range component from the first microphone output signal (s1[n]) such that the filtered first microphone output signal (s1′[n]) only comprises the low frequency range and the high frequency range components. The second filter unit is configured to remove the low frequency and/or the high frequency range components from the second microphone output signal (s2[n]).

Claims12

Dependent claims

A microphone arrangement comprising:

an omnidirectional microphone providing a first microphone output signal (s1[n]);
a unidirectional microphone providing a second microphone output signal (s2[n]);
a first filter unit configured to provide a filtered first microphone output signal (s1′[n]);
an adder configured to provide a microphone arrangement output signal (sout[n]) by summing the filtered first microphone output signal (s1′[n]) and either the second microphone output signal (s2[n]) or a filtered second microphone output signal (s2′[n]) provided by a second filter unit;
the first microphone output signal (s1[n]) comprises a low frequency range, a mid-frequency range, and a high frequency range component, and the second microphone output signal (s2[n]) comprises a low frequency range, a mid-frequency range, and a high frequency range component;
the first filter unit (402) is configured to remove the mid-frequency range component from the first microphone output signal (s1[n]) such that the filtered first microphone output signal (s1′[n]) only comprises the low frequency range and the high frequency range components of the first microphone output signal (s1[n]);
and
the second filter unit is configured to remove the low frequency and/or the high frequency range components from the second microphone output signal (s2[n]) such that either the filtered second microphone output signal (s2′[n]) only comprises the mid-frequency range component of the second microphone output signal (s2[n]), or the filtered second microphone output signal (s2′[n]) comprises the mid-frequency range component and either the low frequency or the high frequency range component of the second microphone output signal (s2[n]).

5 more elements

A method for operating a microphone arrangement, the method comprising:

providing a first microphone output signal (s1[n]) by means of an omnidirectional microphone;
providing a second microphone output signal (s2[n]) by means of a unidirectional microphone;
providing a filtered first microphone output signal (s1′[n]) by means of a first filter unit;
providing a microphone arrangement output signal (sout[n]) by summing the filtered first microphone output signal (s1′[n]) and either the second microphone output signal (s2[n]) or a filtered second microphone output signal (s2′[n]) provided by means of a second filter unit;
the first microphone output signal (s1[n]) comprises a low frequency range, a mid-frequency range, and a high frequency range component, and the second microphone output signal (s2[n]) comprises a low frequency range, a mid-frequency range, and a high frequency range component;
providing a filtered first microphone output signal (s1′[n]) by means of the first filter unit comprises removing the mid-frequency range component from the first microphone output signal (s1[n]) such that the filtered first microphone output signal (s1′[n]) only comprises the low frequency range and the high frequency range components of the first microphone output signal (s1[n]);
and
providing a filtered second microphone output signal (s2′[n]) by means of the second filter unit comprises removing the low frequency and/or the high frequency range components from the second microphone output signal (s2[n]) such that either the filtered second microphone output signal (s2′[n]) only comprises the mid-frequency range component of the second microphone output signal (s2[n]), or the filtered second microphone output signal (s2′[n]) comprises the mid-frequency range component and either the low frequency or the high frequency range component of the second microphone output signal (s2[n]).

5 more elements

Dependencies are inferred from the claim text.