Low-radiation headphone

• US 6,554,097 B2
• Filed: 09/13/2001
• Issued: 04/29/2003
• Est. Priority Date: 09/13/2000
• Status: Expired due to Term

• Current Assignee: König, Florian Meinhard
• Original Assignee: König, Florian Meinhard
• Inventors: König, Florian Meinhard
• Primary Examiner(s): LOCKETT, KIMBERLY R
• Application Number:
  US09/951,272
• Publication Number:
  US 20020066617A1
• Time in Patent Office: 593 Days
• Field of Search: 181/129, 181/130, 181/132, 181/133, 181/134, 181/135, 181/136, 181/137
• US Class Current: 181/129
• CPC Class Codes: H04R 1/1008 Earpieces of the supra-aural or circum-aural type
• CPC Class Codes: H04R 1/1075 Mountings of transducers in earphones or headphones

Abstract

The invention relates to a low-radiation headphone with right and left acoustic irradiation housings corresponding to the ears of the user, with each of the housings having an acoustic baffle (10″) comprising MU-metal and accommodating dynamic audio transducers. The acoustic baffle (10″) is formed in a manner permeable to sound in front of the audio transducers, and has a radiation dissipation zone (20) pointing at the temples of the user. The zone (20) dissipating radiation is provided through a greater density of the MU-metal than in the remaining area of the acoustic baffle (10″) that is permeable to sound. The acoustic baffle (10″) as a whole consists of MU-metal sheet and the audio transducer is perforated in one area (17), but otherwise solid. The radiation dissipation zone (20) is formed in the perforated area of the MU-metal sheet as one piece.

Claims

1. A low-radiation headphone with acoustic irradiation housings associated with the ears of the user, for coupling to accommodating dynamic audio transducers, comprising:

an acoustic baffle disposed in each housing, and whereby said acoustic baffle is formed in a sound-permeable manner in front of the audio transducers and includes a radiation dissipation zone directed toward the temples of the user, said radiation dissipation zone being provided by a greater thickness of the MU-metal than the one in the remaining sound-permeable area of said acoustic baffle said acoustic baffle being made of a MU-metal sheet and perforated only in the area of the audio transducer, wherein the radiation dissipation zone is integrally formed in the perforated area of the MU-metal sheet.

2. The headphone according to claim 1, wherein the radiation dissipation zone is a perforation-free component of the otherwise perforated area of the MU-metal sheet forming said acoustic baffle.

3. The headphone according to claim 1 comprising

a coaxial audio transducer system arranged out-of-center with respect to the center of a circular disk-shaped acoustic baffle for the front location of a sound event generated by said coaxial audio transducer system, primarily a headphone surrounding the ear,

a bridge defining the radiation dissipation zone extending radially from the center of said perforated area to its edge, said center being located concentrically with said audio transducer system.

4. The headphone according to claim 3, wherein said radiation dissipation zone extends tapering from the edge to the center of said perforated area.

5. The headphone according to claim 3, wherein said radiation dissipation zone is extended in a bridged manner beyond said perforated area up to the opposite peripheral edge of the MU-metal sheet forming said acoustic baffle.

6. The headphone according to claim 1 comprising

a coaxial audio transducer system disposed concentrically with a circular disk-shaped acoustic baffle for the front sound location of a sound event generated by said coaxial audio transducer system, primarily a small headphone resting against the ear, wherein a circular sector of the MU-metal sheet forms the acoustic baffle, said circular sector being located above the audio transducer system, and formed in a solid or non-perforated manner and extending from its circular edge up to the radial edges in the area of the audio transducer system, partially covering the latter, wherein the radiation dissipation zone is contained in said circular sector;

and wherein the remaining acoustic baffle is perforated in the zone of said audio transducer system.

7. The headphone according to claim 6, wherein said circular sector is a semicircular sector with an edge extending in a straight line along its diameter.

8. The headphone according to claim 7, wherein said semicircular sector comprises solid MU-metal sheet areas beyond its straight-extending edge, said areas being extended transversely in relation to the straight edge.