Vehicle accessory microphone
First Claim
1. An interior rearview mirror assembly for a vehicle comprising:
- a mirror housing adapted for attachment to the interior of the vehicle, said mirror housing having a top surface, a bottom surface, a back surface extending between said top and bottom surfaces and generally facing the front of the vehicle, and an opening generally facing the rear of the vehicle;
a mirror disposed in said opening of said mirror housing;
a first microphone transducer carried by said mirror housing along said back surface;
a first microphone housing mounted on said back surface such that said first microphone transducer is mounted within said first microphone housing; and
wherein said first microphone housing includes at least one first port covered by a windscreen having an acoustic resistivity of at least 1 acoustic Ω
/cm2 that is acoustically coupled to a front surface of said first microphone transducer.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle rearview mirror assembly (201) includes one or more microphone assemblies (220a, 220b) positioned on the rear surface (207) of the mirror housing (206). Recesses (248a, 248b) are provided in the rear surface to serve as a deflector for deflecting airflow from the defroster. Front ports (216) are provided on the microphone housing (215) that open upward, while rear ports (218) open downward. The microphone assemblies may include an acoustic dam (230) that extends around the microphone transducer (225) to acoustically separate the acoustic chamber within the microphone housing into two zones such that the front face of the transducer is acoustically coupled to the first zone and the rear face of transducer is acoustically coupled to the second zone. The microphone assemblies may include windscreens (245) made of a material of high acoustic resistivity (i.e., about 1 or more Ω/cm2), and preferably of very high acoustic resistivity (i.e., about 8 or more Ω/cm2).
103 Citations
18 Claims
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1. An interior rearview mirror assembly for a vehicle comprising:
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a mirror housing adapted for attachment to the interior of the vehicle, said mirror housing having a top surface, a bottom surface, a back surface extending between said top and bottom surfaces and generally facing the front of the vehicle, and an opening generally facing the rear of the vehicle; a mirror disposed in said opening of said mirror housing; a first microphone transducer carried by said mirror housing along said back surface; a first microphone housing mounted on said back surface such that said first microphone transducer is mounted within said first microphone housing; and wherein said first microphone housing includes at least one first port covered by a windscreen having an acoustic resistivity of at least 1 acoustic Ω
/cm2 that is acoustically coupled to a front surface of said first microphone transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An interior rearview mirror assembly for a vehicle comprising:
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a mirror housing adapted for attachment to the interior of the vehicle, said mirror housing having a top surface, a bottom surface, a back surface extending between said top and bottom surfaces and generally facing the front of the vehicle, and an opening generally facing the rear of the vehicle; a mirror disposed in said opening of said mirror housing; a first microphone transducer carried by said mirror housing along said back surface; a second microphone transducer carried by said mirror housing along said back surface at a position laterally spaced apart from said first microphone transducer; a first microphone housing and a second microphone housing each mounted on said back surface such that said first microphone transducer is mounted within said first microphone housing and the second microphone transducer is mounted within said second microphone housing; and wherein said first microphone housing and said second microphone housing includes at least one first port covered by a windscreen having an acoustic resistivity of at least 1 acoustic Ω
/cm2 that is acoustically coupled to a front surface of both said first microphone transducer and second microphone transducer. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification