Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
  • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
  • H04R1/105—Earpiece supports, e.g. ear hooks
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/01—Head-up displays
  • G02B27/017—Head mounted
  • G02B27/0176—Head mounted characterised by mechanical features
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/02—Permanent magnets [PM]
  • H01F7/04—Means for releasing the attractive force
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
  • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
  • H04R1/1058—Manufacture or assembly
  • H04R1/1075—Mountings of transducers in earphones or headphones
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R5/00—Stereophonic arrangements
  • H04R5/033—Headphones for stereophonic communication
  • H04R5/0335—Earpiece support, e.g. headbands or neckrests
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
  • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
  • H04R2201/025—Transducer mountings or cabinet supports enabling variable orientation of transducer of cabinet

Definitions

• VR Virtual Reality
• MR Mixed Reality
• the present invention relates generally to virtual reality audio-visual headsets, such as for use in amusement/theme park attractions.
• VR virtual reality
• Typical systems in existence consist of a VR headgear system and a motion base.
• Conventional VR headgear uses a screen permanently housed within an enclosure worn by a guest.
• the present invention provides a two-piece headset with audio for AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality), providing reliable easy-to-use audio integration.
• the present invention provides a two-piece headset comprising an audio visual component that in use is releasably coupled (e.g., by magnetic attraction, releasable mechanical fasteners etc.) to a headpiece.
• the viewing screen does not contact the user’s head.
• the headpiece is relatively simple and low-cost, and does not include any electrical components associated with the VR experience. Separating the audio visual component from the headpiece, allows for continued use of the audio visual component with a sequence of headpieces (which may be cleaned and disinfected when not in use).
• the severable headset increases the theoretical hourly capacity of an amusement park ride featuring virtual reality provided individually to riders.
• the present invention provides a headset assembly for providing individualized video and audio to a user, the headset assembly including: a headpiece having: a view opening, a left ear guard and a right ear guard, wherein when the headpiece is in an operational position on the user's head, the view opening is at the user's eyes, the left ear guard is adjacent to the user's left ear and the right ear guard is adjacent to the user's right ear; an audio-visual component configured for interconnection with a video source and an audio source, and having a video display; a left audio speaker and a right audio speaker supported by the audio-visual component; a coupling means for releasably coupling the headpiece and audio-visual component, wherein when the headpiece and audio-visual component are so coupled: the view opening is adjacent the video display; the left audio speaker is reversibly movable between a left engaged position in which the left audio speaker is adjacent the left ear guard, and a left disengaged position in which the left
• the engaged position may be releasably maintained by a magnetic force of attraction between the audio speaker and the adjacent ear guard; and the substantially anterior movement of the audio-visual component relative to the headpiece may weaken the magnetic force of attraction.
• each audio speaker there may be a biasing means tending to cause the audio speaker to move to the disengaged position wherein the biasing means is insufficient to cause the audio speaker to move from the engaged position when the headpiece and audio-visual component are coupled.
• the support of each of the left audio speaker and the right audio speaker by the audio-visual component may be provided by: a headphone arm having a proximal end and a distal end; a pivot mount, pivotally mounting the proximal end to the audio-visual component; and a headphone mount supporting the audio speaker at the distal end; and the biasing means may be a spring assembly engaging the proximal end and the pivot mount.
• the headpiece may include two posterior facing sloped shoulders, one sloped shoulder anterior the left ear guard and the other sloped shoulder anterior the right ear guard, for assisting each audio speaker to move to the disengaged position under the substantially anterior movement of the audio-visual component relative to the headpiece so as to decouple one from the other.
• Each posterior facing sloped shoulder may be concave in profile.
• the coupling means for releasably coupling the headpiece and audio-visual component may include mating magnetic components.
• the mating magnetic components may be headpiece right, left and forehead magnets; and audio-visual component right, left and forehead magnets.
• the audio-visual component may include: a head-mounted display device having the video display; and an adapter to which the head-mounted display device is secured, wherein, the support of each of the left audio speaker and the right audio speaker by the audio-visual component may be provided by: a headphone arm having a proximal end and a distal end; a pivot mount, pivotally mounting the proximal end to the adapter; and a headphone mount supporting the audio speaker at the distal end.
• the adapter may include an adapter body and a clamshell component, and the head-mounted display device may be secured between the adapter body and the clamshell component.
• the present invention provides an amusement attraction involving providing individualized video and audio to a user, the amusement attraction including: a headpiece having: a view opening, a left ear guard and a right ear guard, wherein when the headpiece is in an operational position on the user's head, the view opening is at the user's eyes, the left ear guard is adjacent to the user's left ear and the right ear guard is adjacent to the user's right ear; an audio-visual component configured for interconnection with a video source and an audio source, and having a video display; a left audio speaker and a right audio speaker supported by the audio-visual component; a coupling means for releasably coupling the headpiece and audio-visual component, wherein when the headpiece and audio-visual component are so coupled: the view opening is adjacent the video display; the left audio speaker is reversibly movable between a left engaged position in which the left audio speaker is adjacent the left ear guard, and a left disengaged position in which
• the motion base may include a restraint system.
• the motion base may include a control input and a plurality of actuators.
• Figure 1 is a perspective view of a headset embodiment of the present invention, shown with the headpiece on a user’s head and the audio-visual component disengaged from the headpiece.
• Figure 2 is a perspective view of the embodiment of Figure 1 , shown with the headpiece on a user’s head and the audio-visual component engaged with the headpiece.
• Figure 3 is side elevation view of the embodiment of Figure 1 invention, shown with the audio-visual component engaged with the headpiece.
• Figure 4 is a top plan view of the headset embodiment as shown in Figure 3, shown with the headphone arms in the open position.
• Figure 5 is a top plan partially exploded view of the headset embodiment as shown in Figure 4.
• Figure 6 is a side elevation partially exploded view of the headset embodiment as shown in Figure 5.
• Figure 7 is a sectional view of a pivot base and headphone arm of the embodiment of Figure 1 .
• Figure 8 is an exploded perspective view of a speaker body of the embodiment of Figure 1 .
• Figure 9 is an exploded perspective view of an ear guard of the embodiment of Figure 1 .
• Figure 10 is a perspective view of a schematic representation of a motion base assembly embodiment of the present invention.
• Figure 1 1 is a front elevation view of a schematic representation of the motion base assembly embodiment of Figure 10.
• Figure 12 is a perspective view of a schematic representation of the motion base assembly embodiment of Figure 10 shown with a user, and an audio visual component 102 and headpiece 104 disengaged one from the other.
• Figure 13 is a perspective view of a schematic representation of the motion base assembly embodiment of Figure 10 shown with a user, and an audio visual component 102 engaged with a headpiece 104.
• AR is used to refer to Augmented Reality
• VR is used to refer to Virtual Reality
• MR is used to refer to Mixed Reality
• dorsal is used to refer to posterior or rearward directions
• ventral is used to refer to anterior orforward directions
• medial is used to refer to towards the middle
• lateral is used to refer to towards the side.
• an exemplary headset 100 embodiment of the present invention includes an audio-visual component 102 and a headpiece 104, for use by a user 105.
• the cabling which is conventional is not shown.
• the audio-visual component 102 includes an adapter 106 and a head-mounted display 108.
• the head-mounted display 108 is an HTC VIVETM display.
• the head-mounted display 108 includes a display body 1 10, two view screens 1 12, a connection interface 1 14 (for connecting the head-mounted display 102 to a visual and audio data feed), and display mount engagement projections 1 16.
• the adapter 104 includes an adapter body 140, a clamshell 142, a left headphone assembly 144, a right headphone assembly 146, and a hook loop 148.
• the adapter body 140 includes an adapter body view opening 160, display mount engagement receptacles 162 (for receiving the display mount engagement projections 1 16), a clamshell mount 164 with clamshell mount screw receiving threaded bores 166, a left headphone assembly mount 168, a right headphone assembly mount 170, a left adapter magnetic anchor 172, a right adapter magnetic anchor 174, and a forehead adapter magnetic anchor 176.
• Each headphone assembly mount 168, 170 includes a hook loop groove 178, for mounting the hook loop 148 on either side of the adapter body 140.
• hook loop 148 is shown as projecting laterally from the adapter body 140, but to be clear, the engagement between the hook loop groove 178 and hook loop 148 is such that the hook loop 148 is pivotal within the hook loop groove 178 roughly 180 degrees, i.e., between projecting substantially ventrally and projecting substantially dorsally.
• the clamshell 142 includes two screw holes 190 and, optionally, a tether coupling 192.
• the display body 1 10 is releasably secured to the adapter body 140 by interposing the display body 1 10 between the adapter body 140 and the clamshell 142, and affixing the clamshell 142 to the adapter body 140 by inserting the clamshell mount screws 194 through the screw holes 190 into the clamshell mount screw receiving threaded bores 166.
• the joint between the adapter body 140 and the clamshell 142 defines a cable opening 196 that in use is fitted with a cable-protecting rubber grommet 198.
• the clamshell 142 also houses a custom PCB (Printed Circuit Board) for interconnecting the audio-visual component 102 to other components and to a data feed.
• PCB Print Circuit Board
• Each headphone assembly 144, 146 includes: a pivot base 200 (configured to be mounted to a respective headphone assembly mount 168, 170); a headphone arm 202; a hinge pin 204 passing through the pivot base 200 and the proximal end of the headphone arm 202; and a speaker body 206 mounted at the distal end of the headphone arm 202.
• the pivot base 200 includes a spring assembly 208 for resiliently biasing headphone arm 202 towards an open disengaged position.
• the spring assembly 208 includes a coil spring 210 and a spring follower 212 both: slidably mounted on a spring follower rod 214, and interposed between a spring seat 216 and a headphone arm fork 218.
• the speaker body 206 includes: a speaker cup 220, an outer foam profile 222; an inner foam profile 224, a speaker 225 (in the exemplary embodiment shown in the drawings, a 925 - XDC 16 NL2240mm Speaker Driver); two upper speaker magnets 226 (in the exemplary embodiment shown in the drawings, each is a neodymium magnet, 1/2" diameter and 1/8" thick N52); a lower speaker magnet 228 (in the exemplary embodiment shown in the drawings, a 925 neodymium magnet, 1/2" diameter and 1 /16" thick N52); an ear cup face plate 230 having three speaker magnet seats 232 (in which the speaker magnets 226,228 are secured, e.g., with an adhesive such as epoxy); an ear guard felt 234 (affixed to the ear cup face plate 230 with an adhesive, e.g., a peel and stick adhesive); and four speaker screws 236 (for attaching the ear cup face plate 230 and speaker cup 220 together).
• the speaker cup 220 includes an oval cup opening 237.
• the distal end of the headphone arm 202 includes a speaker cup mount 238 comprising: a speaker cup mount projection 239 including an oval shoulder 240 configured for a loose fit within the oval cup opening 238; an outer rubber washer 241 (for abutting the exterior of the speaker cup 220); an inner rubber washer 242 (for abutting the interior of the speaker cup 220); a collar 243; and a collar retainer pin 244.
• each speaker box is flexibly attached to the headphone arm in a manner permitting some relative rotation and pivoting of the headphone relative to the headphone arm, but such flexible mounting is not present in all embodiments).
• the headpiece 104 includes a headpiece body 250; a left ear guard 251 ; a right ear guard 252; and an adjustable strap 253.
• the headpiece body 250 includes; a headpiece view opening 254; a left headpiece magnetic anchor 255; a right headpiece magnetic anchor 256; and a forehead headpiece magnetic anchor257.
• Each of the left headpiece magnetic anchor 255 and the right headpiece magnetic anchor 256 has a dorsal facing concave shoulder 258.
• a headpiece pad assembly 259 (comprising cushioning padding foam that preferably has anti-bacterial attributes) is affixed to the interior of the headpiece body
• the ear guards 251 , 252 are positioned so that each ear guard 251 , 252 overlies a user's ear when the headpiece 104 is in position on the user's head.
• the ear guards 251 , 252 are intended to provide a physical, but sound transmitting, barrier, between the user's ears and the speaker bodies 206, so as to maintain a satisfactory sanitary state for the speaker bodies 206 for multiple sequential users.
• Each ear guard 251 , 252 includes three ear guard magnets 260 (in the exemplary embodiment shown in the drawings, each is a 925 neodymium magnet, 1/2" diameter and 1/16" thick N52), an ear guard plate 261 having three ear guard magnet seats 262 (in which the ear guard magnets 260 are secured, e.g., with an adhesive such as epoxy); an ear muff 263 (comprising a pliable foam material to provide a soft comfortable surface and a form of sound isolation/seal); and an ear muff transfer tape 264 (for affixing the ear muff 263 to the ear guard plate 261 ).
• Each ear guard 251 , 252 is attached to a respective side of the headpiece body 250 with conventional fasteners (e.g., screws).
• Each ear guard 251 , 252 has a sound conducting ear guard hole 265 (in the exemplary embodiment, having a diameter of 28mm).
• 251 , 252 is configured so as to have an inward cant of about 15 degrees to accommodate the “spread” occasioned by users with large heads while providing desired proximity to the ears of users with smaller heads.
• the adjustable strap 253 is attached to each side of the headpiece body 250 and includes a dog-leg portion 270 on each side (to accommodate the speaker bodies 206 and to allow the adjustable strap to be at the desired position on the user’s head) and a user operable releasable tensioning device 271 with a ratcheting knob.
• the adjustable strap 253 is attached to the headpiece body 250 by means of fasteners so as to permit pivotal movement of the adjustable strap 253 relative to the headpiece body 250 as desired by the user when adjusting the adjustable strap 253.
• the adjustable strap 253 is preferably positioned under, or adjacent to, the user's occipital bone and tightened with the ratcheting knob until comfortably snug.
• Use of the headset 100 involves: the user being provided with the headpiece 104 and securing it on their head with the ratchet knob as outlined above, with the user’s ears adjacent the ear muffs 263; the headpiece 104 equipped user being brought into the vicinity of the audio-visual component 102 or the audio-visual component 102 being brought into the vicinity of the headpiece 104 equipped user, as the case may be; the user 105 bringing the audio-visual component 102 into contact with the ventral portion of the headpiece 104 so as to engage the left adapter magnetic anchor 172, right adapter magnetic anchor 174, and forehead adapter magnetic anchor 176, with the left headpiece magneticanchor255, right headpiece magneticanchor256, and forehead headpiece magnetic anchor 257, so as to releasably couple the audio visual component 102 to the headpiece 104; the user 105 moving each headphone arm 202 and speaker body 206, medially so as to bring the respective speaker magnets 226, 228 into engagement with the respective ear guard magnets
• the user may directly manually move each headphone arm 202 and speaker body 206 laterally so as to disengage each speaker body 206 from the associated earguard 251 , 252 and enable the resiliently biasing of the headphone arms 202 to move the speaker bodies 206 laterally towards the open disengaged positions.
• the ear guard felt 234 functions to reduce sound transmission between the ear cup face plate 230 and the respective ear guard 251 , 252, which along with the ear muff 263, outer foam profile 222 and inner foam profile 224, provides desirable sound isolation for the user.
• the headpiece 104 and adapter 106 preferably comprise molded plastic components.
• the headpiece 104 is resiliency flexible so as to accommodate differences between user's heads in terms of the size and shape.
• the hinging/pivoting of the headphone arms 202 and speaker bodies 206 relative to the adapter body 140 accommodates distortions (i.e. , differences in the shape) of the headpiece resulting from differences in users' heads.
• the interface between the adapter 106 and the headpiece 104, and the engagement of the speaker bodies 206 and the ear guards 251 , 252, may be configured such that each adaptor 106 may be used with a plurality of different sizes of headpieces (so as to accommodate users of different sizes/ages).
• the hinging/pivoting of the headphone arms 202 relative to the adapter body 140 facilitates such use with headpieces of different sizes.
• Amusement park attractions featuring head mounted display with removable screens allow for operators to provide individualized virtual reality environments to each and every rider.
• Each rider can have a unique virtual experience as they look around in the virtual environment and are moved corresponding with the virtual environment.
• the ride comprises a motion base, a tethered head mounted display, a lap bar, display hanger, and a control input.
• the motion base typically comprises a chair mounted to a plurality of linear actuators for moving the chair in the virtual environment.
• the display hanger is rotationally attached to the motion base and moves the tethered head mounted display towards and away from the user as needed.
• the lap bar is rotationally attached to the motion base and prevents riders from leaving the attraction until the ride is over.
• the lap bar is geared to the display hanger such that when the lap bar is located in the user's lap an end of the display hanger is directly over their head. Alternatively, when the lap bar is over their head, the end of the display hanger is located behind the user's head.
• Control input is a joystick to allow the user to move the motion base and therefor themselves in the virtual environment.
• a front facing camera located on the tethered head mounted display can track the user’s hands to provide input into the virtual environment. For example, the user can steer a virtual steering wheel by placing their hands in front of them and rotating them around the virtual steering wheel.
• Motion base 301 includes: a base 303, a chair 305 supported by the base 303, an input system 307, a restraint system 309, an audio-visual component support system 31 1 , and a plurality of actuators 315.
• the input system 307 shown in the drawings comprises a motion sensing joystick configured to allow a user to provide input into the virtual reality environment. It should be apparent that chair 305 could be a wheelchair or motorized scooter releasably affixed to a substantially planar base.
• the plurality of actuators 315 preferably consist of a first actuator, a second actuator, and a third actuator. While linear actuators are illustrated, it should be apparent that the motion base actuators could have other mechanical outputs such as rotary actuators and oscillatory actuators.
• the actuators 315 are spaced apart in a tripod configuration wherein the first actuator is located near a front of the motion base 301 , and the second and third actuators are located near a rear of the motion base 301 .
• the plurality of actuators 315 are configured to move the motion base 301 responsive to the controller and the input system 307. For example, the controller may move the motion base 301 as if the user 105 is on a boat riding down a series of rapids, the user can select which fork of the river to ride down by moving the input system .
• Restraint system 309 includes a lap bar rigidly attached to a C shaped member.
• Audio-visual component support system 31 1 includes an extended member configured to support a virtual reality headset over the user.
• Audio-visual component support system 31 1 also includes a retraction system to adjust a length of the tether to the audio-visual component 102.
• both the restraint system 309 and the audio-visual component support system 31 1 pivot about the user 105.
• Restraint system 309 is rotationally coupled to the audio-visual component system 31 1 , for example, by a gearing system located in the motion base 301 .
• the gearing system preferably has a 2: 1 gearing ratio however other ratios are contemplated by this application.
• the gearing system is geared such that the VR support system rotationally moves half as much as the restraint system. This gearing system allows the restraint system to pivot up and out of the way of the user while moving the VR headset back and away from the user. This allows the user to get into and out of the chair 305 easily and quickly.
• a restraint system may comprise a five point harness for a system configured as a flight simulator, wherein a portion of the harness is coupled to the gearing system such that securing the harness moves the audio-visual component support system 31 1 closer to the user.
• the five point harness may not adjust the location of the audio-visual component support system 31 1 .
• Other types of restraints are contemplated by this application such as seatbelts, over the shoulder restraints, locking lap bars, T-bars.
• the audio-visual component support system 31 1 is illustrated as being directly attached to the motion base 301 , it should be apparent that the audio-visual component support system 31 1 may be located remotely to the motion base 301 .
• the audio-visual component support system 31 1 may be mounted to a wall or ceiling located near the motion base 301 .
• the audio-visual component 102 is tethered to the audio-visual component support system 31 1 to prevent removal and provide data and power to the audio-visual component 102.
• Other embodiments may include retraction system to move the audio-visual component 102 close to and away from the user.
• a hanger may located above the motion base 301 with the hanger configured to lower the tethered audio-visual component 102 to the vicinity of the user's lap.
• the audio-visual component 102 may be suspended near the user's head, or may rest in an adjacent basket or hang on an adjacent hook, until user coupled to the headpiece 104.
• Figure 12 illustrates an open position of the motion base 301 .
• Open position is configured to allow a user 105 to enter and exit the chair 305.
• the user 105 is entirely supported by the motion base 301 as the user 105 sits in the chair 305 and places their feet on the footrests.
• the engaging motion base 301 when the engaging motion base 301 , the user is wearing a headpiece 104 on the user’s head.
• the user 105 straddles the input system 307.
• the audio-visual component support system 31 1 locates audio-visual component 102, over and behind the user's head.
• Audio-visual component 102 is tethered to and supported by audio-visual component support system 31 1 .
• the restraint system 309 In the open position, the restraint system 309 is also located above the user's head. As the user 105 pulls down on the restraint system 309 the audio-visual component support system 31 1 pivots down and locates the audio- visual component 102 in front of the user's face . The user 105 grasps the audio-visual component 102 and couples the audio-visual component 102 to the headpiece 104 and brings the speaker bodies 206 into contact with the ear guards 251 , 252, to form the headset 100.
• the system is configured such that the end of the hanger moves from in front of and above the user in an initial position to above and behind the initial position in a subsequent position.
• the system moves the hanging display from a location proximate the user's head to a location further away. Moving the display between locations or positions provides easy access to the motion base without users hitting their heads and damaging the displays. While the proximate location illustrated is in front of the user's head it should be apparent that the proximate location may be on the side of the user's head or just above the user 1 s head.
• the non-proximate location is any location where the user can enter the motion base freely without interference from the display.
• the audio-visual component 102 is decoupled from the headpiece 104 by the user 105.
• user manipulation of the audio-visual component 102 to decouple if from the headpiece 104 causes the speaker bodies 206 to disengage from the ear guards 251 , 252.
• the restraint system 309 is released by an operator.
• the user 105 then pulls up on the restraint system 309 and the audio-visual component support system 31 1 pivots up and behind the user 105.
• the headpiece 104 is removed and is washed/disinfected to be ready for subsequent use.
• the system described above is configured for an amusement attraction, it should be apparent that the system alternatively could be configured for a gaming system and or a flight simulator. Both military and civilian use of the system provides virtual reality providers with quicker turnaround and higher usage of the equipment than conventional virtual reality systems. Additionally, the system comprising a two piece virtual reality headset and motion base is configurable for locations where groups of users are exposed to virtual reality environments, such as in amusement parks, theme parks, carnivals, exhibitions, tours, traveling exhibitions, orientation centers, fairs, museums, family entertainment centers (FEC's), driving simulators, and flight simulators. [0063] The scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.

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• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Health & Medical Sciences (AREA)
• Otolaryngology (AREA)
• Manufacturing & Machinery (AREA)
• Electromagnetism (AREA)
• Power Engineering (AREA)
• Headphones And Earphones (AREA)
• Helmets And Other Head Coverings (AREA)

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• 2020
  • 2020-04-16 WO PCT/CA2020/050510 patent/WO2020210910A1/en unknown
  • 2020-04-16 CA CA3137187A patent/CA3137187A1/en active Pending
  • 2020-04-16 JP JP2021549170A patent/JP2022529204A/ja active Pending
  • 2020-04-16 KR KR1020217036752A patent/KR20210151913A/ko not_active Application Discontinuation
  • 2020-04-16 EP EP20790471.5A patent/EP3957080A4/de active Pending
  • 2020-04-16 CN CN202080021920.5A patent/CN113574909A/zh active Pending

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