This disclosure relates to headphones.
All examples and features mentioned below can be combined in any technically possible way.
In one aspect, a headphone includes an earphone that includes an earcup, an ear cushion, and a driver plate assembly. The driver plate assembly is supported in the earcup and includes a driver plate, a driver mounted along a rear surface of the driver plate, an opening that is provided in the driver plate to allow acoustic energy to pass from the driver into a user's ear canal, a ring that is arranged substantially coaxially with the opening, and an acoustic mesh. The ring defines a planar surface on which the acoustic mesh is mounted.
Implementations may include one of the following features, or any combination thereof.
In some implementations, the headphone may also include a microphone and a support structure that extends at least partially across the diameter of the ring and supports the microphone over the opening.
In certain implementations, the support structure is designed to be substantially flush with the planar surface of the ring such that the mesh lies in a substantially flat plane.
In some cases, the microphone is arranged substantially coaxially with the driver.
In certain cases, the support structure is in the form of a bridge that extends across the diameter of the ring.
In some examples, the microphone is a feedback microphone for a feedback noise cancellation system.
In certain examples, the acoustic mesh acoustically loads the microphone such that resonances are reduced, thereby allowing increased gain in a feedback loop of the feedback system.
In some implementations, the mesh lies in a substantially flat plane with no bends or folds.
In certain implementations, the headphone may also include a plurality of radially spaced apart spokes supporting the ring.
In some cases, respective first surfaces of the spokes extend outwardly away from a front surface of the driver plate, opposite the rear surface, and terminate at the ring.
In certain cases, the first surfaces of the spokes extend outwardly from the front surface of the driver plate in a substantially frusto-conical shape.
In some examples, respective second surfaces of the spokes extend into the opening and away from the front surface of the driver plate.
In certain examples, the second surfaces of the spokes extend in a substantially frusto-conical shape.
In some implementations, the second surfaces of the spokes act as a mechanical limit for the driver.
In certain implementations, the second surfaces of the spokes define tabs that act as the mechanical limit for the driver.
In some cases, the driver plate is received within the earcup so as to define a first acoustic cavity between an inner surface of the earcup and the rear surface of the driver plate.
In certain cases, the earcup has a front opening adapted to be adjacent an ear of a user; and a cushion around the periphery of the front opening formed with an ear opening and arranged to accommodate the ear of the user.
In some examples, the headphone may also include a headband and a yoke that couples the earphone to the headband.
In certain examples, the planar surface includes first and second planar surfaces that together define a beveled surface.
In some implementations, the first and second planar surfaces intersect at or near a support structure that extends at least partially across the diameter of the ring and is configured to support a microphone over the opening.
In certain implementations, the support structure is flush with the first planar surface.
In some cases, the mesh includes a bend or crease aligned with the intersection of the first and second planar surfaces.
In certain implementations, the mesh includes a first portion that rests on the first planar surface and a second portion that rests on the second planar surface.
In some examples, the first planar surface is arranged in a first plane and the second planar surface is arranged in a second plane, and wherein the second plane is arranged at a non-zero angle relative to the first plane.
In certain examples, the second plane is arranged at an angle of about 1 degrees to about 9 degrees relative the first plane.
In certain examples, the ring includes a protruding rim that provides a perimetric boundary within which the mesh is disposed.
Commonly labeled components in the FIGURES are considered to be substantially equivalent components for the purposes of illustration, and redundant discussion of those components is omitted for clarity. Numerical ranges and values described according to various implementations are merely examples of such ranges and values and are not intended to be limiting of those implementations. In some cases, the term “about” is used to modify values, and in these cases, can refer to that value +/−a margin of error, such as a measurement error, which may range from up to 1-5 percent.
Cushion assembly 104 is preferably generally tubular. This arrangement allows the sliders to be received within the volume on the inside of the tube and also allows wiring to pass along the length of the cushion assembly. Sliders 106a and 106b are located in part in this interior volume of the cushion assembly. Each slider has a proximal end 110a, 110b located in the cushion assembly (e.g., end 110a of slider 106a) and a distal end 112a, 112b (e.g., end 112a of slider 106a). Coupling members 114a and 114b (collectively “114”) are pivotably coupled to sliders 106. The coupling members each carry an earphone 108 (a/k/a “earpiece”) at their far ends. Earphones 108a and 108b are shown in
The sliders are preferably but not necessarily each generally hollow tubes with a generally flat exterior surface that lies closest to the head. In the example shown in the drawings, slider 106a has flat exterior surface 141 of lower half 140 of the slider tube. Pivot axis 50 that is defined by axle 130 lies below surface 141 and is generally parallel to surface 141. The sliders may have an oblong cross-sectional shape, such as a stadium (aka “racetrack”), oval or elliptical shape.
An example of a coupling member 114b is shown in more detail in
A conductive cable 126 (a/k/a “wiring”) (
A support structure 420 (a/k/a “diving board”) for the feedback microphone 406 extends from the driver plate 402 towards the center point of the ring 414 and is covered by the acoustic mesh 408 (
Locating the feedback microphone 406 in the center of ring 414 (centered over the driver 404) can help to reduce sensitivity to rocking modes. However, other arrangements are contemplated. In some implementations, the feedback microphone may be located off center from the driver. As an example, the feedback microphone may be placed above (i.e., in alignment with) the voice coil of the driver, which allows the feedback microphone to be situated further down and can help to reduce the delay in the critical driver transfer function
The mesh 408 is provided primarily for the purpose of ensuring low head-to-head (fit-to-fit) variation in the transfer function, Gsd, between the driver 404 and the feedback microphone 406. In order to provide high performing feedback ANR for most users it can be important to have a consistent and predictable plant response. An issue with the prior art design is that, because of the manner in which the mesh 408 is mounted, e.g., above a convex surface that dips down away from the front surface 418 of the driver plate 402 and on the plate 402 itself which might be slightly concave or uneven along its front surface 418, there can be quite a bit of variability in the mesh placement during assembly from device to device. This inconsistent placement can make it difficult to accurately predict the acoustic properties of the system, which is necessary to provide high performing feedback noise cancellation. Ideally, a consistent assembly is desirable in order to more accurately predict acoustics.
To address the shortcomings of the prior art design, the “wagon wheel” of the present disclosure has been redesigned such that, rather than dropping away from a front surface 504 of the driver plate 308, additional structure has been added to the spokes 506 such that the first surfaces of the spokes 506 now extend outward from the front surface 504 of the driver plate 308, as illustrated in
Additionally, the diving board (i.e., the cantilevered support structure 420 of the prior art) is replaced with a more stable bridge 502 that extends across the diameter of the ring 508 and provides additional structural support for the feedback microphone 312. The bridge 502 is designed to be substantially flush with the planar surface 510 on the ring 508 such that the mesh 314 no longer requires a bend (see, e.g., item 422 of
This new design provides a number of benefits. First, since a planar surface is now provided for supporting the mesh, a more consistent and repeatable placement of the mesh can be expected, and, consequently, more predictable acoustic properties for the system. Second, since a bend in the mesh is no longer necessary, a wider variety different mesh materials may be considered—a metal mesh was previously required in order to provide the bend.
In addition, sharp resonances in the earcup may make it more difficult if not impossible to implement effective feedback control in the corresponding frequency range, so the sharp resonances may generally require implementing less effective feedback control. By acoustically loading the microphone 312 and driver 310 with the acoustic mesh 314, resonances are significantly reduced, allowing increased gain in the feedback loop and significantly improved active noise reduction in an earcup of relatively small volume.
A number of implementations have been described. Nevertheless, it will be understood that additional modifications may be made without departing from the scope of the inventive concepts described herein, and, accordingly, other implementations are within the scope of the following claims.
For example, while an implementation has been described above in which the ring defines a planar surface that can support the mesh, in some implementations the ring may define a beveled surface as shown in
With reference to
As shown in
Referring to
All definitions, as defined and used herein, should be understood to control over dictionary definitions, definitions in documents incorporated by reference, and/or ordinary meanings of the defined terms.
The indefinite articles “a” and “an,” as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean “at least one.”
The phrase “and/or,” as used herein in the specification and in the claims, should be understood to mean “either or both” of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with “and/or” should be construed in the same fashion, i.e., “one or more” of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the “and/or” clause, whether related or unrelated to those elements specifically identified.
As used herein in the specification and in the claims, “or” should be understood to have the same meaning as “and/or” as defined above. For example, when separating items in a list, “or” or “and/or” shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as “only one of” or “exactly one of,” or, when used in the claims, “consisting of,” will refer to the inclusion of exactly one element of a number or list of elements. In general, the term “or” as used herein shall only be interpreted as indicating exclusive alternatives (i.e., “one or the other but not both”) when preceded by terms of exclusivity, such as “either,” “one of,” “only one of,” or “exactly one of.”
As used herein in the specification and in the claims, the phrase “at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase “at least one” refers, whether related or unrelated to those elements specifically identified.
It should also be understood that, unless clearly indicated to the contrary, in any methods claimed herein that include more than one step or act, the order of the steps or acts of the method is not necessarily limited to the order in which the steps or acts of the method are recited.
In the claims, as well as in the specification above, all transitional phrases such as “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” “holding,” “composed of,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Only the transitional phrases “consisting of” and “consisting essentially of” shall be closed or semi-closed transitional phrases, respectively.
Other implementations are within the scope of the following claims and other claims to which the applicant may be entitled.
While various examples have been described and illustrated herein, those of ordinary skill in the art will readily envision a variety of other means and/or structures for performing the function and/or obtaining the results and/or one or more of the advantages described herein, and each of such variations and/or modifications is deemed to be within the scope of the examples described herein. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the teachings is/are used. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific examples described herein. It is, therefore, to be understood that the foregoing examples are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, examples may be practiced otherwise than as specifically described and claimed. Examples of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein. In addition, any combination of two or more such features, systems, articles, materials, kits, and/or methods, if such features, systems, articles, materials, kits, and/or methods are not mutually inconsistent, is included within the scope of the present disclosure.