Method for providing a spatially perceptible acoustic signal for a two-wheeler

Description

[0001] The invention relates to a method and a system for providing a spatially perceptible acoustic signal to a cyclist. The invention further relates to a helmet worn by a cyclist when using the bicycle.

[0002] Wearing a helmet while riding a two-wheeled vehicle, such as a motorcycle or scooter, acoustically isolates the rider from their surroundings. Furthermore, since wearing a helmet impairs spatial perception of sounds, the rider is unable to spatially identify signals or sounds. Furthermore, the field of vision is restricted when wearing a helmet, making it easy to overlook the two-wheeled vehicle's controls and displays.

[0003] To enable communication with a passenger on a two-wheeler, motorcycle helmets are known to be equipped with a speaker system and a microphone, allowing two-way communication between the two riders. To enable a rider to communicate with another participant via their mobile phone, some helmets are also equipped with a Bluetooth communication unit, which enables the exchange of messages between the helmet's Bluetooth communication unit and a mobile device.

[0004] US 9,578,419 B1 discloses a method and apparatus for estimating the spatial content of a sound field for a user wearing a helmet that mimics the sound a user would experience without a helmet. For this purpose, the helmet is equipped with two or more microphones to record sounds. After filtering the sounds and placing virtual loudspeakers at the positions of identified sound sources, the sounds are output via the virtual loudspeakers through the helmet's stereo speakers.

[0005] In US 2003 / 0059070 A1, a pair of loudspeakers is not mounted in headphones, but at a location near the temple of a listener's head, such as on a pair of glasses or inside a helmet. A head tracking system, also attached to the frame to which the loudspeakers are mounted, determines the position and orientation of the listener's head and feeds the measurements to a computer system for audio signal processing in conjunction with a filter to generate spatially distributed audio signals. The filter maintains the virtual position of the audio signals, thus allowing the listener to change the position and orientation of their head without degrading the audio signal. The system generates virtual sound sources that are perceived externally and positioned in any desired orientation in azimuth and elevation from the listener's perspective.

[0006] US 2015 / 0336578 A1 discloses a system in the context of transportation that interacts with a wearable device, such as a helmet, goggles, or the like. The wearable device can receive and process audio data received from microphones mounted on a vehicle.

[0007] The object of the invention is to provide a method and a system that enable the provision of a spatially perceptible acoustic signal for a cyclist. A further object is to provide a helmet for a cyclist that enables the perception of spatial signals.

[0008] These objects are achieved by a method according to the features of claim 1, a system according to the features of claim 13 and a helmet according to the features of claim 18. Advantageous embodiments emerge from the dependent claims.

[0009] A method for providing a spatially perceptible acoustic signal for a cyclist is proposed.The method comprises the steps of: providing an acoustic signal by a two-wheeler, wherein the acoustic signal is an actuation signal of an operating element of the two-wheeler generated by the two-wheeler, which is generated depending on the position of a switch of the operating element, determining a pose of a helmet worn by the two-wheeler rider relative to the two-wheeler, processing the acoustic signal depending on the determined pose to form a three-dimensional output signal which represents a binaural image of the acoustic signal, outputting the output signal via stereo headphones of the helmet, wherein the output signal places a sound source contained in the acoustic signal in space depending on the determined pose, whereby the sound source can be spatially located for the two-wheeler rider, wherein the output signal uses the volume to give an impression of how close the location of the sound source is relative to the two-wheeler rider.

[0010] The method is based on the idea that a noise source can be generated in three-dimensional space using stereo headphones installed in a helmet. This is done by taking into account the pose of the helmet worn by the cyclist relative to the bicycle when generating and outputting the output signal. The pose is understood to be the combination of the position and orientation of the helmet, and thus of the ears of the cyclist's head, relative to the bicycle. It can therefore be taken into account whether the cyclist is facing in the direction of travel or across / sideways to the direction of travel. Since the location of the sound source remains constant regardless of the movement of the helmet and thus the pose, the cyclist can be given the impression of the location of the sound source relative to him by changing the output signal accordingly and outputting it via the stereo headphones.This makes it easier for the cyclist to locate the location of the acoustic signal, allowing him or her to react quickly, for example.

[0011] The acoustic signal can be an actuation signal of a control element, in particular a turn signal lever or a multifunction controller, generated by the two-wheeler. While the driver of a motor vehicle can perceive the actuation of a turn signal lever, for example, via a relay or the simulation of such a sound, this is not possible for the two-wheeler rider due to the helmet they are wearing. In this case, the actuation signal generated by the turn signal lever is processed as an acoustic signal together with the pose to form the three-dimensional output signal and output via the helmet's stereo headphones. Depending on the switch position (turn signal is set to the right or left), the location of the sound source can then be generated to the left or right of the two-wheeler. The two-wheeler rider thus receives not only feedback that the turn signal lever has been actuated, but also in which direction the turn signal lever was actuated.In principle, actuation signals can be generated by any control element of the two-wheeler. The actuation signals can differ in their location and / or tone and / or pitch depending on the actuated control element. Local perception is also ensured, regardless of the helmet's position relative to the two-wheeler.

[0012] The acoustic signal can be a voice signal. The voice signal can, for example, be voice information output by an infotainment system of the two-wheeler, such as a navigation announcement, a weather forecast, a traffic report, etc. A voice signal can also include feedback about the operation of a control element and the like. The voice signal can also be a voice signal received from another road user, in particular a two-wheeler rider. In this case, for example, in a larger group of two-wheelers, the voice signal of a first two-wheeler in the front left, a second two-wheeler in the front right, a third two-wheeler in the rear left, and so on can be generated. The spatial placement of the voice signals of various other two-wheelers can also be positioned according to the actual relative position to the two-wheeler rider of the two-wheeler using the method.

[0013] The acoustic signal can be a warning signal from a driver assistance system. Such a driver assistance system can, in particular, be a maneuvering or parking aid, similar to a so-called park distance control system in motor vehicles. For this purpose, as with systems known from motor vehicles, the distance to obstacles and other road users (generally: objects) can be measured using ultrasonic sensors or other sensors. Depending on a decreasing distance and the location, e.g., rear left or rear right, the output signal can be generated via the stereo headphones to signal the cyclist that the two-wheeler is approaching from the rear left or rear right. The output signal is generated depending on the pose of the helmet in relation to the two-wheeler, e.g.A head rotating left or right around the torso axis, so that the approach point appears stationary due to the signal emitted through the stereo headphones. This makes orientation much easier for the cyclist.

[0014] A driver assistance system can also be a blind spot system or a cross-traffic warning system, similarly well-known in motor vehicles. Provided the two-wheeler is equipped with appropriate sensors, an acoustic signal can be emitted via stereo headphones, regardless of whether the rider detects a vehicle approaching from the rear or the side of the vehicle themselves or via the mirror. Depending on whether the other road user is approaching from the rear left or right, the output signal is generated in such a way that the rider of the two-wheeler has the impression that the other road user is approaching from the corresponding rear side. A corresponding acoustic perception can be implemented in a cross-traffic warning system, which is intended to facilitate entering a road.

[0015] The acoustic signal can be a warning signal generated by the two-wheeler from information received by the two-wheeler, where the information is a warning tone from another road user that is picked up by a microphone on the two-wheeler, or where the information is a message sent and received by a transmitter that represents a warning. The acoustic signal can, for example, represent the siren of an ambulance or a police vehicle. Depending on the direction from which the road user with the siren activated is approaching the rider of the two-wheeler, this is synthesized as an output signal via the stereo headphones. Since the generation of the output signal from the acoustic signal and the determination of the pose of the helmet occur continuously, the movement of the acoustic signal can be easily simulated and output via the stereo headphones.In another embodiment, the acoustic signal can be information transmitted, for example, by another vehicle via vehicle-to-vehicle communication. This can be used, for example, to signal a road user who has broken down. Since the output signal always creates a spatial reference between the location of the sound source or transmitter relative to the two-wheeler, it is immediately clear to the cyclist where, for example, a source of danger is located.

[0016] The output signal can not only provide information about the location of the sound source. Rather, the volume of the output signal can also convey an impression of how close the sound source is relative to the two-wheeler or rider. For example, the output signal can become louder the closer the helmet is to the location where the acoustic signal is generated (i.e., the location of the sound source).

[0017] According to a suitable embodiment, the pose of the helmet worn by the cyclist relative to the bicycle is determined by an inertial measuring unit in the helmet and / or in the bicycle. Alternatively or additionally, the pose of the helmet worn by the cyclist relative to the bicycle is determined by one or more cameras in the helmet and / or the bicycle.

[0018] Methods for determining the rotation and / or position of the helmet relative to the two-wheeler are well known from the prior art. For example, a single inertial measurement unit (IMU) can be used for this purpose, as described, for example, in [1]. An alternative method for determining the pose using a single inertial measurement unit is described in [2]. Alternatively, so-called differential methods of inertial measurement units can be used, as described, for example, in [3]. An arrangement for determining the pose using an inertial measurement unit and magnetic tracking is described in [4]. Camera-based approaches for position determination are known, for example, from [5]. Technologically, all of the methods mentioned deliver the same result, which differs only in the quality of the determined pose.

[0019] According to a further advantageous embodiment, determining the pose of the helmet worn by the cyclist relative to the bicycle comprises at least a rotational movement of the helmet relative to the direction of travel of the bicycle. This takes into account the fact that the cyclist rotates their head relatively frequently while using the bicycle due to the restricted field of vision caused by wearing the helmet. This allows the cyclist to be provided with the location of the sound source with relatively good accuracy by appropriately generating the output signal in the helmet.

[0020] A further improved localization of the location of a sound source is made possible by the fact that, according to a further expedient embodiment, the determination of the pose of the helmet worn by the cyclist relative to the bicycle includes a distance of the helmet from a handlebar of the bicycle and / or from another component of the bicycle. This allows, for example, the location of the sound source to be identified as the helmet approaches relative to the handlebar or the other component of the bicycle by varying the volume of the output signal.

[0021] According to a practical embodiment, the pose can be determined by a computing unit in the helmet. Alternatively, the pose can be determined by a computing unit in the two-wheeler. A variant is also conceivable in which the pose is determined by both a computing unit in the helmet and a computing unit in the two-wheeler. Any necessary sensor data is then transmitted from the helmet to the two-wheeler, or vice versa, so that all data required for calculating the pose can be processed in the respective computing unit.

[0022] According to a further expedient embodiment, the acoustic signal is transmitted from the two-wheeler to the rider's helmet, and the output signal is determined by a computing unit in the helmet. Alternatively, the output signal is determined by a computing unit in the two-wheeler, and the output signal is transmitted from the two-wheeler to the rider's helmet.

[0023] According to a further advantageous embodiment, the output signal is determined by a 3D sound processor, in which the acoustic signal and information representing the pose are combined to form the output signal. Such 3D sound processors are well known in the art. The relevant principles can be found, for example, in publications [6] and [7]. Generally, such algorithms are based on time differences between signals until they reach the left and right auricles, as well as on different phases and amplitudes.

[0024] The invention further proposes a system for providing a spatially perceptible acoustic signal for a two-wheeler rider according to the method described above. The system comprises a two-wheeler, a helmet to be worn by a two-wheeler rider, a unit for determining a pose of the helmet, and a unit for determining the output signal. The two-wheeler comprises a first communication unit, wherein an acoustic signal, which is an actuation signal of an operating element of the two-wheeler generated by the two-wheeler and generated depending on the position of a switch of the operating element, can be provided by the two-wheeler and contains at least one sound source. The helmet to be worn by the two-wheeler rider comprises a second communication unit and stereo headphones for reproducing the audio signal. The pose-determining unit serves to determine the pose of the helmet relative to the two-wheeler.The unit for determining the output signal is designed to process the acoustic signal depending on the determined pose and the proximity of the location of the sound source relative to the cyclist to produce the three-dimensional output signal, which represents a binaural image of the acoustic signal.

[0025] The proposed system has the same advantages as those described above in connection with the method according to the invention.

[0026] According to a practical embodiment, the helmet and / or the two-wheeler comprise an inertial measuring unit and / or one or more cameras.

[0027] According to a further expedient embodiment, the helmet or the two-wheeler comprises the unit for determining the pose of the helmet.

[0028] According to a further expedient embodiment, the helmet or the two-wheeler comprises the unit for determining the output signal.

[0029] In addition, the system may comprise further means for carrying out the method described here.

[0030] The invention further provides a helmet for providing a spatially perceptible acoustic signal for a cyclist, which serves for use in the method described here. The helmet comprises a communication unit, stereo headphones for reproducing an audio signal, wherein the acoustic signal is an actuation signal of an operating element of the bicycle generated by the bicycle, which is generated depending on the position of a switch of the operating element, and a unit for determining the output signal by processing the acoustic signal as a function of a determined pose and the proximity of the location of the sound source relative to the cyclist to produce the three-dimensional output signal, which represents a binaural image of the acoustic signal.

[0031] According to a suitable embodiment, the helmet can comprise an inertial measurement unit. According to a further suitable embodiment, the helmet can comprise a unit for determining the pose of the helmet.

[0032] The invention is explained in more detail below using an exemplary embodiment in the drawing. In the drawings, like features are provided with like reference numerals. They show: Fig. 1 shows a schematic representation of a two-wheeler and a helmet, wherein the helmet is in a first pose relative to the two-wheeler; Fig. 2 shows a schematic representation of a two-wheeler and a helmet, wherein the helmet is in a second pose relative to the two-wheeler; and Fig. 3 shows a schematic representation of the sequence of the method according to the invention.

[0033] The Fig. 1 and 2each show in a schematic view the essential components of a system 1 according to the invention for providing a spatially perceptible acoustic signal for a cyclist.

[0034] The system comprises a two-wheeler 10, which is only shown in part, and a helmet 20, which is to be worn by a two-wheeler rider (also not shown) while using the two-wheeler 10.

[0035] The two-wheeler 10 typically comprises a handlebar 11, operating elements 12, display elements 13, and the like. The operating elements 12 are attached to the handlebar 11 in the usual way. The operating elements 12 include switches, such as a light switch, a horn, a turn signal, and the like. The display elements 13 are also arranged on or in the area of ​​the handlebar 11 and include a speedometer, a tachometer (digital and / or analog), and a display for visualizing status information of the two-wheeler 10, maps, navigation displays, and the like. The display element 13 can be designed as an infotainment system. The actuation of a respective operating element 12 is generally accompanied by a visualization of the actuation, e.g., a (flashing) light.

[0036] The two-wheeler 10 can also have one or more driver assistance systems 18. Driver assistance systems known from motor vehicles have recently been adopted as driver assistance systems 18 and adapted to the two-wheeler 10. These include, for example, a maneuvering or parking aid, which, with the aid of one or more ultrasonic sensors, particularly in the rear area of ​​the two-wheeler, detects the area that is not or poorly visible to the cyclist in order to provide information about, for example, distances to a nearby object when maneuvering or reversing. Due to the helmet 20 worn by the cyclist, the cyclist is acoustically decoupled from the environment, which is why data processed by the driver assistance system 18 is visualized, for example, on the display element 13. The driver assistance system 18 can also, for example,Using the ultrasonic sensors already mentioned, a blind spot system can be provided, which allows the approach of a moving object from the side and rear. Such signaling can be provided, similar to motor vehicles, e.g., with the help of a warning light integrated in the left or right exterior mirror. Other driver assistance systems that could be considered include cross-traffic warning systems, which warn the cyclist of crossing objects when entering an intersection with poor visibility. Cross-traffic detection can be achieved using ultrasonic sensors and / or cameras. Information about cross-traffic can then be visualized via the display element 13.

[0037] The two-wheeler 10 further comprises a communication unit 14, an optional unit 15 for determining an output signal, an optional camera 16 and a central control unit 17.

[0038] The communication unit 14 is configured to exchange data with a corresponding communication unit 22 of the helmet 20. Furthermore, the communication unit 14 can be configured to exchange data, e.g., with the display element 13 (in the form of an infotainment system) or with a mobile radio terminal (not shown) of the cyclist or with other mobile radio terminals and / or communication nodes. In other words, the communication unit 14, which can comprise a plurality of different communication components based on different communication standards, provides general communication functions.

[0039] The optional output signal determination unit 15 and the optional camera 16 are controlled by the central control unit 17. Their function will be described in detail below.

[0040] The helmet 20 to be worn by the cyclist while using the two-wheeler 10 comprises, in a known manner, a stereo headset 21 with a left loudspeaker 21L and a right loudspeaker 21R, a communication unit 22 for communicating with the already described communication unit 14 of the two-wheeler 10, an optional inertial measurement unit (IMU) 23 and an optional unit 24 for determining the output signal.

[0041] Output signals received from the communication unit 22 can be output via the left and right speakers 21L, 21R of the stereo headset 21. The output signal can include, for example, a voice signal, but also other noise sources, as will be explained in more detail below.

[0042] The communication unit 22 can communicate with the communication unit 14 of the two-wheeler 10 using any communication standard. Short-range communication standards such as Bluetooth, Zigbee, or Wi-Fi are suitable.

[0043] In the preceding description, the unit 15 for determining the output signal and the camera 16 of the two-wheeler 10, as well as the inertial measurement unit 23 and the unit 24 for determining the output signal of the helmet 20, were each referred to as optional. This is to be understood in such a way that in a minimum configuration of the system, either the camera 16 of the two-wheeler 10 or the inertial measurement unit 23 of the helmet 20 is provided. This means that one of the components is mandatory, the other optional. In another embodiment, both the camera 16 and the inertial measurement unit 23 can be provided.

[0044] Accordingly, in a minimum configuration of the system, either the unit 15 or the unit 24 for determining the output signal is optionally provided in the two-wheeler 10 or the helmet 20. In another embodiment, both the unit 15 and the unit 24 for determining the output signal can be provided in the two-wheeler 10 and the helmet 20.

[0045] Since the cyclist is acoustically decoupled from his environment due to wearing his helmet 20 while using the bicycle 10, the perception and, in particular, the location of sound sources has been difficult or even impossible. The proposed system enables the provision of a spatially perceptible acoustic signal for the cyclist. The method is carried out according to the Fig. 3 shown process.

[0046] In step 300, an acoustic signal is provided by the two-wheeler. The acoustic signal can be an actuation signal of one of the control elements 12 generated by the two-wheeler 10. For example, if the cyclist actuates the turn signal lever, an acoustic signal is generated and provided, just like in a motor vehicle. The acoustic signal is generated electronically and is only audible when the helmet 20 is used.

[0047] The acoustic signal can also be a voice signal, in particular from the infotainment system 13 of the two-wheeler 10. The voice signal can also be a voice signal received from another road user, in particular a two-wheeler rider, which was received by the two-wheeler 10 via its communication unit 14. The acoustic signal can also be a warning signal from the aforementioned driver assistance system 18. For this purpose, sensor-determined signals are evaluated by the driver assistance system 18, and an acoustic signal corresponding to the driving situation is generated, which, for example, signals the approach of an obstacle during maneuvering. Alternatively, the acoustic signal can be a warning signal generated by the two-wheeler 10 from information received by the two-wheeler 10. Such information can be received via the communication unit 14.This can, for example, be received by another road user via vehicle-to-vehicle communication from the two-wheeler 10. The warning signal can also be a warning signal actually present in the vicinity of the two-wheeler, which is detected by a microphone (not shown) of the two-wheeler and converted into the acoustic signal by the computing unit 17.

[0048] In step 310, a pose of the helmet 20 worn by the cyclist relative to the bicycle 10 is determined. The pose is the combination of position and orientation of the helmet 20 in three-dimensional space relative to the bicycle 10. In particular, a rotation of the helmet 20 relative to the vertical axis or body axis of the cyclist relative to his Fig. 1shown starting position, in which the cyclist is looking forward. Alternatively or additionally, a distance of the helmet relative to a control element, in particular the handlebars 11 of the two-wheeler 10, can also be detected.

[0049] The pose of the helmet 20 relative to the two-wheeler 10 is determined with the aid of the inertial measuring unit 23 and / or the camera 16 of the two-wheeler 10. The methods required for determining position and orientation in three-dimensional space are known from the prior art, so that a detailed description of the exact determination is omitted.

[0050] In step 320, the provided acoustic signal is processed depending on the determined pose. The result of the processing is a three-dimensional output signal that represents a binaural image of the acoustic signal and places the acoustic signal in three-dimensional space according to the location of its origin relative to the two-wheeler. The three-dimensional output signal is determined using the unit 15 and / or 24 for determining the output signal. The corresponding units 15 and 24 can be designed as 3D sound processors for this purpose. Corresponding algorithms for providing the three-dimensional output signal are known from the prior art, so a detailed description is omitted here.

[0051] If the three-dimensional output signal is generated using unit 15 of the two-wheeler 10, the acoustic signal and the information representing the pose are provided to unit 15. If the pose is determined by the camera 16 of the two-wheeler 10, all the information required to determine the three-dimensional output signal is available in the two-wheeler 10. If, however, the pose is determined using the inertial measurement unit 23 of the helmet 20, the corresponding data is transmitted from the communication unit 22 to the communication unit 14 of the two-wheeler 10 and then fed to unit 15 for processing.

[0052] If the three-dimensional output signal is determined by unit 24 of helmet 20, the acoustic signal is transmitted from communication unit 14 of two-wheeler 10 to communication unit 22 of helmet 20. The information representing the pose is also transmitted from two-wheeler 10 to helmet 20 using communication units 14, 22 if it was determined by camera 16. However, the transmission of this data is not necessary if the pose is determined using the inertial measurement unit 23 in helmet 20.

[0053] In step 330, the three-dimensional output signal is output via the stereo headphones 21 of the helmet 20. The output signal is placed in space depending on the determined pose in such a way that a sound source contained in the acoustic signal can be spatially located for the cyclist.

[0054] If, for example, the cyclist operates the turn signal lever, the clicking sound of the turn signal relay generated above is generated as an acoustic signal. If, for example, the turn signal lever is the control element with the reference number 12 located in the left area of ​​the handlebar, the output signal is generated in such a way that, from the cyclist's perspective, the clicking sound of the relay comes from the front left, from the area of ​​the handlebar 11. This is made possible by adjusting the signal propagation times and the amplitudes of the signals between the left and right loudspeakers 21L, 21R. If the cyclist turns, as shown in Fig. 2 shown, his head around the vertical axis of the bicycle or his body axis slightly to the left, the time differences and signal amplitudes are adjusted so that the location of the sound source is still perceived by the bicycle rider as originating from the left area of ​​the handlebar 11.

[0055] If the cyclist uses a parking assistance system while maneuvering, then when the two-wheeler 10 approaches an object, for example, at the rear right, the acoustic signal is converted into the output signal in such a way that the driver perceives the warning tone as coming from the rear right. When the head is turned, as is usually done by the cyclist when maneuvering, the time delay differences and signal amplitudes are again adjusted so that the location of the sound source, i.e., the approach tone, remains statically at the rear right behind the two-wheeler 10.

[0056] During a group ride with multiple riders, the proposed method can acoustically assign a fixed location relative to the rider's own two-wheeler 10 to the other participants. Thus, vocal messages from a first rider, who is, for example, to the right of the two-wheeler 10, appear as coming from the right. For a second, different, two-wheeler rider, who is to the left behind the rider's own two-wheeler 10, upon receiving corresponding voice signals, the output signal is generated in such a way that the second two-wheeler rider appears to be to the left behind the motorcycle.

[0057] The method also enables the provision of an enhanced voice assistant. For example, when attempting to locate a specific component of the two-wheeler, the output signal can be made louder or quieter depending on whether the driver correctly or incorrectly approaches the component in question. This provides the rider with an acoustic indication as to whether they are approaching or moving away from the component they are looking for. A voice assistance system can place instructions directly on the control element. For example, if the user asks about the functionality of the light switch, the voice assistant can shape the audio signal to make it easier for the user to locate the switch.

[0058] The localization of acoustic signals allows the rider to react more safely and quickly. It also enables the implementation of driver assistance systems, such as Park Distance Control, without the need to equip the bike with a screen or additional speakers.

[0059] When riding in a group, the cognitive load for the cyclist when locating individual passengers is reduced.

[0060] Furthermore, it enables the implementation of functionalities that normally require output units attached to the motorcycle. Quotation list

[0061] [1] A. Kim et al.: "A Quaternion-Based Orientation Estimation Algorithm Using an Inertial Measurement Unit", 2004, IEEE, Seiten 268-272 [2] S. LaValle et al.: "Head Tracking for the Oculus Rift", abrufbar unter http: / / msl.cs.illinois.edu / ~lavalle / papers / LavYerKatAnt14.pdf [3] E. Foxlin: "Head-tracking relative to a moving vehicle or simulator platform using differential inertial sensors", Proceedings of Helmet and Head-Mounted Displays V, SPIE Vol. 4021, AeroSense Symposium, Orlando, FL, 24.-25. April 2000 [4] M. Meina et al.: "Position tracking using inertial and magnetic sensing aided by permanent magnet", Proceedings of the Federated Conference on Computer Science and Information Systems, ACSIS, Vol. 8, 2006, IEEE, Seiten 105-111 [5] A. Chen et al.: "Single-camera kinematic tracking using ArUco markers", 7. Dezember 2016, abrufbar unter http: / / eecs.mines.edu / Courses / csci507 / projects / 2016 / Actis_Chen.pdf [6] M.Lalwani: "Surrounded by sound: how 3D audio hacks your brain", The Verge, 12. Februar 2015, abrufbar unter http: / / www.theverge.com / 2015 / 2 / 12 / 8021733 / 3d-audio-3dio-binaural-immersive-vr-sound-times-square-new-york [7] D. Hong et al.: "Real-time sound propagation hardware accelerator for immersive virtual reality 3D audio", Proceeding, 13D'17 Proceedings of the 21st ACM SIG-GRAPH Symposium on Interactive 3D Graphics and Games, Article No. 20, San Francisco, California, 25.-27. Februar 2017 . List of reference symbols

[0062] 1System for providing a spatially perceptible acoustic signal 10Two-wheeler 11Handlebar 12Control element 13Display element / Infotainment system 14Communication unit 15Unit for determining the output signal (3D sound processor) 16Camera 17Central control unit 18Driver assistance system 20Helmet 21Stereo headphones 21Left speaker 21Right speaker 22Communication unit 23Inertial measurement unit (IMU) 24Unit for determining the output signal (3D sound processor)

Claims

1. Method for providing a spatially perceptible acoustic signal for a rider of a two-wheeled vehicle, with the following steps: - providing an acoustic signal by a two-wheeled vehicle (10), wherein the acoustic signal is an actuation signal which is generated by the two-wheeled vehicle (10) for an operating element (12) of the two-wheeled vehicle (10) and is generated on the basis of the position of a switch of the operating element (12); - determining a pose of a helmet (20) worn by the rider of the two-wheeled vehicle relative to the two-wheeled vehicle (10); - processing the acoustic signal depending on the determined pose to form a three-dimensional output signal which constitutes a binaural projection of the acoustic signal; - outputting the output signal via a stereo headset (21) of the helmet (20), wherein the output signal spatially places a sound source contained in the acoustic signal depending on the determined pose, whereby the sound source is spatially locatable by the rider of the two-wheeled vehicle, and wherein the output signal gives an impression of how close the location of the sound source is relative to the rider of the two-wheeled vehicle via the sound volume.

2. Method according to Claim 1, in which the acoustic signal is an actuation signal generated by the two-wheeled vehicle (10) for an indicator lever or a multifunction controller.

3. Method according to Claim 1 or 2, in which the acoustic signal is a voice signal, in particular of an infotainment system (13) of the two-wheeled vehicle (10), or a voice signal received from a different road user, in particular a rider of a two-wheeled vehicle.

4. Method according to one of the preceding claims, in which the acoustic signal is a warning signal from a driver assistance system (18), in particular a manoeuvring or parking aid or a blind spot system or a cross-traffic warning system, of the two-wheeled vehicle (10).

5. Method according to one of the preceding claims, in which the acoustic signal is a warning signal which is generated by the two-wheeled vehicle (10) from information received by the two-wheeled vehicle (10), wherein the information is a warning tone from a different road user which is picked up by a microphone of the two-wheeled vehicle (10), or wherein the information is a received message transmitted by a transmitter, representing a warning.

6. Method according to one of the preceding claims, in which the pose of the helmet (20) worn by the rider of the two-wheeled vehicle relative to the two-wheeled vehicle (10) is determined by an inertial measurement unit (23) in the helmet (20) and / or in the two-wheeled vehicle (10) and / or by one or more cameras (16) in the helmet (20) and / or in the two-wheeled vehicle (10).

7. Method according to Claim 6, in which the determination of the pose of the helmet (20) worn by the rider of the two-wheeled vehicle relative to the two-wheeled vehicle (10) comprises at least one rotational movement of the helmet (20) relative to the direction of travel of the two-wheeled vehicle (10).

8. Method according to Claim 6 or 7, in which the determination of the pose of the helmet (20) worn by the rider of the two-wheeled vehicle relative to the two-wheeled vehicle (10) comprises a distance between the helmet (20) and a handlebar of the two-wheeled vehicle (10) and / or a different component of the two-wheeled vehicle (10).

9. Method according to one of Claims 6 to 8, in which the pose is determined by a computing unit in the helmet (20) and / or in the two-wheeled vehicle (10).

10. Method according to one of Claims 1 to 9, in which the acoustic signal is transmitted from the two-wheeled vehicle (10) to the helmet (20) of the rider of the two-wheeled vehicle and the output signal is determined by a computing unit in the helmet (20).

11. Method according to one of Claims 1 to 9, in which the output signal is determined by a computing unit in the two-wheeled vehicle (10) and the output signal is transmitted from the two-wheeled vehicle (10) to the helmet (20) of the rider of the two-wheeled vehicle.

12. Method according to Claim 10 or 11, in which the output signal is determined by a 3D sound processor by combining the acoustic signal and information representing the pose with one another to form the output signal.

13. System for providing a spatially perceptible acoustic signal for a rider of a two-wheeled vehicle according to the method set out in the preceding claims, comprising: - a two-wheeled vehicle (10) with a first communication unit, wherein an acoustic signal, which is an actuation signal which is generated by the two-wheeled vehicle (10) for an operating element (12) of the two-wheeled vehicle (10) and is generated on the basis of the position of a switch of the operating element (12), is providable by the two-wheeled vehicle (10) and contains at least one sound source; - a helmet (20) to be worn by a rider of the two-wheeled vehicle with a second communication unit and a stereo headset (21) to reproduce an output signal; - a unit for determining a pose of the helmet (20) relative to the two-wheeled vehicle (10); - a unit for determining the output signal by processing the acoustic signal depending on the determined pose and the proximity of the location of the sound source relative to the rider of the two-wheeled vehicle to form the three-dimensional output signal which constitutes a binaural projection of the acoustic signal.

14. System according to Claim 13, characterized in that the helmet (20) and / or the two-wheeled vehicle (10) comprise(s) an inertial measurement unit (23) and / or one or more cameras (16).

15. System according to Claim 13 or 14, characterized in that the helmet (20) or the two-wheeled vehicle (10) comprises the unit for determining the pose of the helmet (20).

16. System according to one of Claims 13 to 15, characterized in that the helmet (20) or the two-wheeled vehicle (10) comprises the unit for determining the output signal.

17. System according to one of Claims 13 to 15, characterized in that said system comprises further means for carrying out the method according to one of Claims 1 to 12.

18. Helmet (20) for providing a spatially perceptible acoustic signal for a rider of a two-wheeled vehicle for use in a method according to one of Claims 1 to 12, comprising - a communication unit; - a stereo headset (21) for reproducing an output signal, wherein the acoustic signal is an actuation signal which is generated by the two-wheeled vehicle (10) for an operating element (12) of the two-wheeled vehicle (10) and is generated on the basis of the position of a switch of the operating element (12); - a unit for determining the output signal by processing the acoustic signal depending on a determined pose and the proximity of the location of the sound source relative to the rider of the two-wheeled vehicle to form the three-dimensional output signal which constitutes a binaural projection of the acoustic signal.

19. Helmet (20) according to Claim 18, characterized in that it comprises an inertial measurement unit (23).

20. Helmet (20) according to Claim 18 or 19, characterized in that it comprises a unit for determining the pose of the helmet (20).