Abstract: Provided is a sensing system useful with a follower vehicle configured to track and follow a leader. The sensing system can include a plurality of sensing technologies configured to cooperatively track and follow the leader. In some embodiments, the plurality of sensing technologies can include one or more of a stereoscopic camera ranging system, a wide field of view monocular camera, and a radar imaging system, or other sensor technologies. In various embodiments, the vehicle can comprise a chassis, a drive mechanism supported by the chassis and arranged to drive a plurality of wheels, a body supported by the chassis and, optionally, an internal volume defined within the body. In some embodiments, the follower vehicle can be a two-wheeled mobile carrier, for example.

Abstract: System and method for improving the shaving experience by providing improved visibility of the skin shaving area. A digital camera is integrated with the electric shaver for close image capturing of shaving area, and displaying it on a display unit. The display unit can be integral part of the electric shaver casing, or housed in a separated device which receives the image via a communication channel. The communication channel can be wireless (using radio, audio or light) or wired, such as dedicated cabling or using powerline communication. A light source is used to better illuminate the shaving area. Video compression and digital image processing techniques are used for providing for improved shaving results. The wired communication medium can simultaneously be used also for carrying power from the electric shaver assembly to the display unit, or from the display unit to the electric shaver.

Abstract: An image pickup apparatus includes an image sensor unit that includes a fixed unit and a movable unit movable relative to the fixed unit, and a duct unit configured to form an air channel. The movable unit includes an image sensor and a heat exchanger. At least part of the heat exchanger is inserted inside the duct unit through an opening of the duct unit.

Abstract: A camera module, which is mounted on an inside of a front windshield of a vehicle and to image an external environment of the vehicle, includes a lens unit and an imager to image the external environment by forming an optical image, which is from the external environment through the lens unit.

Abstract: An integrated image sensor and lens assembly including an image sensor, a lens barrel, and a lens element. The lens barrel configured to direct light to the image sensor. The lens barrel is a multiple segment lens barrel or a multiple subsection lens barrel. The multiple segment lens barrel or the multiple section lens barrel includes: a first segment or a first subsection, and a second segment or a second subsection. The lens element located within the lens barrel. The first segment or the first subsection is movable relative to the second segment or the second subsection.

Abstract: Processing for judging whether a face is included in a frame is performed, in a predetermined interval, on each of frames included in a moving image of a subject, displayed on a monitor, until the judgment becomes positive. If it is judged that a face is included in a frame, the facial position is detected in the frame, and stored. Then, judgment is made as to whether a face is included in the next frame after predetermined time. If the judgment is positive, the facial position is detected. The previously stored facial position is replaced by the newly detected facial position, and the newly detected facial position is stored. These processes are repeated until photographing operation is performed by operating a release unit.

Abstract: The invention relates to a long-range optical device comprising at least one sight channel and an image capturing channel with a camera module, wherein the sight channel and the image capturing channel are coupled to one another by means of an adjusting mechanism such that a first image detail observed in the sight channel essentially corresponds to a second image detail captured by the camera module; an interface module for establishing a connection with an electronic terminal; a processing unit; a memory unit, and a support unit, in which support unit the sight channel is arranged, wherein a heat dissipation device is formed between the support unit and the processing unit and/or between the support unit and a housing of the sight channel and/or on the camera module. The invention moreover relates to an observation and image capturing system.

Abstract: A portable electronic device with image capturing capabilities automatically or semi-automatically adjusts one or more image capturing parameters based on an input attribute of user engagement with a single-action haptic input mechanism. For example, the duration for which a single-action control button carried on a frame of the device is pressed automatically determines an image stabilization mode for on-board processing of captured image data. In one example, an above-threshold press duration automatically activates a less rigorous image stabilization mode, while button release before expiry of the threshold automatically activates a more rigorous photo stabilization mode.

Abstract: A display apparatus includes an image display element, an eyepiece portion, an object window, and a reflection optical element disposed at a position between the eyepiece portion and the object window, the reflection optical element being configured to guide a picture displayed on the image display element to the eyepiece portion. The reflection optical element changes a state to a first state and a second state by changing a transmittance. In the first state, the picture displayed on the image display element is viewed via the eyepiece portion. In the second state, an image in which an image from the object window and an image displayed on the image display element are superimposed is viewed via the eyepiece portion.

Abstract: A computer-implemented method, a computer system and a computer program product improve the quality of multimedia. The method includes displaying a current frame of a video. The method also includes generating dataframes for the current frame and for a reference frame of the video. The method further includes comparing the dataframes for the reference and current frames. In addition, the method includes determining a quality metric of the current frame based on the comparison of the dataframes for the reference and current frames. Finally, the method includes altering an orientation of the display of the current frame in response to determining that the quality metric of the current frame is below a threshold.

Abstract: A control apparatus includes: an acquisition unit configured to acquire an operation instruction made by a voice input to an imaging device including: an optical system including a focus lens; and an image sensor; and a controller configured to control the focus lens moving at a first velocity to stop movement when the operation instruction is an instruction to stop an operation of the focus lens, and control the focus lens to move at a second velocity lower than the first velocity.

Abstract: Pulsed fluorescence imaging without input clock or data transmission clock is disclosed. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation. The system includes a plurality of bidirectional data pads and a controller in communication with the image sensor. The system is such that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises one or more of: electromagnetic radiation having a wavelength from about 770 nm to about 790 nm.

Abstract: Some embodiments include a camera voice coil motor (VCM) actuator that includes an additive coil structure for shifting a lens along one or multiple axes. The additive coil structure may include a base portion configured to couple with a lens carrier and at least partially surround a perimeter of the lens carrier. In various examples, the additive coil structure may include folded portions that individually include a respective coil that is located proximate a respective magnet. According to various embodiments, the additive coil structure may be formed using an additive process.

Abstract: Dual-aperture digital cameras with auto-focus (AF) and related methods for obtaining a focused and, optionally optically stabilized color image of an object or scene. A dual-aperture camera includes a first sub-camera having a first optics bloc and a color image sensor for providing a color image, a second sub-camera having a second optics bloc and a clear image sensor for providing a luminance image, the first and second sub-cameras having substantially the same field of view, an AF mechanism coupled mechanically at least to the first optics bloc, and a camera controller coupled to the AF mechanism and to the two image sensors and configured to control the AF mechanism, to calculate a scaling difference and a sharpness difference between the color and luminance images, the scaling and sharpness differences being due to the AF mechanism, and to process the color and luminance images into a fused color image using the calculated differences.

Abstract: A device includes a focus detection unit configured to detect a defocus amount based on a focus detection signal output from an image capturing device, an object detection unit configured to detect a specific object based on image data output from the image capturing device, and a processing unit configured to perform first obstacle detection processing detecting an obstacle based on characteristics of the defocus amount on the specific object, and to perform second obstacle detection processing detecting an obstacle higher in spatial frequency than the specific object.

Abstract: An image processing device performs shake information adjustment processing for adjusting shake information at the time of imaging when input image data constituting a moving image is captured and generating adjusted shake information, shake modification processing for changing a state of shake of the input image data using the adjusted shake information to obtain shake-modified image data, and association processing for associating at least one of the input image data and the shake-modified image data, the shake information at the time of imaging, and shake modification information capable of specifying a processing amount of the shake modification processing with each other.

Abstract: Methods and apparatus for supporting zoom operations using a plurality of optical chain modules, e.g., camera modules, are described. Switching between use of groups of optical chains with different focal lengths is used to support zoom operations. Digital zoom is used in some cases to support zoom levels corresponding to levels between the zoom levels of different optical chain groups or discrete focal lengths to which optical chains may be switched. In some embodiments optical chains have adjustable focal lengths and are switched between different focal lengths. In other embodiments optical chains have fixed focal lengths with different optical chain groups corresponding to different fixed focal lengths. Composite images are generated from images captured by multiple optical chains of the same group and/or different groups. Composite image is in accordance with a user zoom control setting. Individual composite images may be generated and/or a video sequence.

Abstract: An image processing device includes: an input unit, first image data being a portion of an image with first and second photographic subjects being imaged being inputted therein, the second subject to be displayed after the first, and the first subject again to be displayed by repeating control to shift a portion of the image displayed upon the display unit in a first direction and to display a portion not displayed; and an image generation unit generating, from the first image data, second image data including the first and second subjects, and the second subject is arranged towards the first direction from the first subject, if a first distance by which the image displayed shifts from the first subject being displayed until the second subject is displayed is longer than a second distance by which the image displayed shifts from the second subject until the first subject is displayed.

Abstract: The disclosure provide methods and content consumption devices that enable a scene, for example a 360° scene, that is larger (i.e. has more pixels in at least one dimension) than a display format of the content consumption device to be displayed. Constituent scene views are received individually by the content consumption device, for example as broadcasts, and are combined, for example stitched together, at the content consumption device to output a part of the scene that fits in the display format. The part of the scene (and hence the required constituent streams) to be displayed are determined by a signal, for example a navigational input from a user, enabling the user to navigate in the scene.

Abstract: An image capturing apparatus comprising, an image sensor capable of performing exposure control for each of a plurality of partial regions obtained by dividing an image capturing region, and a control unit configured to perform exposure control of the image sensor, wherein the control unit sets a control value of exposure control for each partial region based on a size of the partial region to decrease a response speed of exposure control for a larger partial region, and performs exposure control of the image sensor based on the set control value.

Abstract: An adaptive filter system and a method for controlling the adaptive filter system are described herein. The system can includes one or more filters to attenuate incoming light. The one or more filters can be moved by one or more actuators. The method can capture image data from an imaging device through the one or more filters. Information can be determined from the captured image data. The one or more filters can be moved to a position for capturing image data based on the information.

Abstract: Systems, methods, and devices for fluorescence imaging with increased dynamic range are disclosed. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation, wherein the pixel array comprises a plurality of pixels each configurable as a short exposure pixel or a long exposure pixel. The system includes a controller comprising a processor in electrical communication with the image sensor and the emitter. The system is such that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises one or more of electromagnetic radiation having a wavelength from about 770 nm to about 790 nm or electromagnetic radiation having a wavelength from about 795 nm to about 815 nm.

Abstract: A device includes at least one camera, a transmitter, and a main controller. The at least one camera is configured to collect an image and obtain an image signal. The transmitter includes a first signal end and a second signal end. The first signal end includes a first quantity of connection channels electrically connected to the photographing module, and the second signal end includes a second quantity of connection channels electrically connected to the main controller. The first quantity is greater than the second quantity. The image signal is transmitted from the first signal end to the second signal end. The main controller module is configured to receive and process the image signal.

Abstract: An image capturing device includes: an image capturing element having a first image capturing region that captures an image of a photographic subject and outputs a first signal, and a second image capturing region that captures an image of the photographic subject and outputs a second signal; a setting unit that sets an image capture condition for the first image capturing region to an image capture condition that is different from an image capture condition for the second image capturing region; a correction unit that performs correction upon the second signal, for employment in interpolation of the first signal; and a generation unit that generates an image of the photographic subject that has been captured by the first image capturing region by employing a signal generated by interpolating the first signal according to the second signal as corrected by the correction unit.

Abstract: An imaging device includes groupings of photodiodes having four photodiodes. A transfer transistor is between each photodiode and a floating diffusion. Each floating diffusion is coupled to up to two photodiodes per grouping at a time through transfer transistors. A buffer transistor is coupled to each floating diffusion. The buffer transistors may be in a first or second grouping of buffer transistors. A first bit line is coupled to up to two buffer transistors of the first grouping and a second bit line is coupled to up to two buffer transistors of the second grouping of buffer transistors at a time. A color filter array including a plurality of groupings of color filters is disposed over respective photodiodes of the photodiode array, wherein each grouping of color filters includes four color filters having a same color, wherein each grouping of color filters overlaps two groupings of photodiodes.

Abstract: A switch driver circuit includes a plurality of pullup transistors. The plurality of pullup transistors includes a first pullup transistor coupled between a voltage supply and a first output node. A plurality of pulldown transistors includes a first pulldown transistor coupled between the first output node and a ground node. A slope control circuit is coupled to the ground node. A plurality of global connection switches includes a first global connection switch coupled between the first output node and the slope control circuit.

Abstract: A depth camera assembly (DCA) determines distances between the DCA and objects in a local area within a field of view of the DCA. The DCA projects a series of sinusoidal patterns into the local area DCA and captures images of the sinusoidal patterns via a sensor. Each pixel of the augmented sensor includes a plurality of charge bins, and charge accumulated by a photodiode of a pixel during different time intervals (e.g., times when different sinusoidal patterns are emitted) is stored in a different charge storage bin. Charge may be retrieved from different charge storage bins to determine depth from the DCA.

Abstract: An image sensor includes a pixel configured to operate in a high conversion gain (HCG) mode and a low conversion gain (LCG) mode during a readout period, and a correlated double sampling (CDS) circuit configured to generate a comparison signal based on a ramp signal and a pixel voltage received from the pixel, wherein the CDS circuit includes a comparator configured to: receive the pixel voltage through a first input node, receive the ramp signal through a second input node based on an LCG reset signal or an LCG image signal being received as the pixel voltage, and receive the ramp signal through a third input node based on an HCG reset signal or an HCG image signal being received as the pixel voltage; and compare the ramp signal to the pixel voltage, and output the comparison signal corresponding to a comparison result.

Abstract: An imaging arrangement comprising: a plurality of pixels arranged in a matrix; and a signal processing arrangement. A first and a second line of the matrix each comprise a light-receiving pixel and a reference pixel, the light-receiving pixels each receive incident light and output a light signal based on the incident light, and each reference pixel outputs a pixel signal for forming an address signal. The processing arrangement provides a first address signal and a second address signal, wherein: the first address signal indicates the position of the first line and comprises a signal value based on the pixel signal from the first line; and the second address signal indicates the position of the second line and comprises a signal value based on the pixel signal from the second line; and the signal value of the first address signal is different to the signal value of the second address signal.

Abstract: An image capture apparatus that comprises an image sensor that includes a pixel array in which a plurality of pixels are disposed in rows and columns and a plurality of column signal lines provided for each column of the pixels, is disclosed. The apparatus further comprises a first correction circuit and a second correction circuit that share application of correction of offset caused by a difference in column signal lines where the pixel signals are read out to.

Abstract: An imaging element of an imaging unit 24 divides the exit pupil of an imaging optical system 21 into a plurality of regions and generates a pixel signal for each region. An optical axis position adjustment unit 23 adjusts the optical axis position of the imaging optical system with respect to the imaging element. A control unit 26 calculates a parallax on the basis of the pixel signal for each region after the pupil division and performs focus control of the imaging optical system 21. The control unit 26 also moves the optical axis position using the optical axis position adjustment unit 23, and generates, using the imaging element, pixel signals indicating the same subject region in the plurality of regions after the pupil division. An image processing unit 25 performs binning of a plurality of pixel signals indicating the same subject region generated by moving the optical axis position to generate a high-resolution captured image.

Abstract: An imaging device according to an embodiment of the present disclosure includes: a plurality of current sources including first group current sources and second group current sources; and a control unit that controls driving of the first group current sources to generate a first-phase ramp voltage and controls driving of the first group current sources and at least one current source of the second group current sources to generate a second-phase ramp voltage.

Abstract: The present technology relates to a solid-state imaging device, method for driving the same, and electronic apparatus capable of avoiding an occurrence of a blackout in low-speed read-out. The solid-state imaging device includes a pixel array unit in which a plurality of pixels is two-dimensionally arranged in a matrix, and a control unit that exposes all pixels of the pixel array unit at a same exposure timing and performs thinned read-out 2(N?1) times in which all the pixels are thinned to 1/N, so as to read electric charge in all the pixels of the pixel array unit, the electric charge being generated at the same exposure timing. The present technology can be applied to, for example, a solid-state imaging device, or the like, incorporated in an imaging device.

Abstract: A solid-state image sensor includes a semiconductor substrate having a photoelectric conversion element converting incident light into a charge and a charge retaining section temporarily retaining the charge photoelectrically converted by the photoelectric conversion element and a light shielding section having an embedded section extending in at least a region between the photoelectric conversion element and the charge retaining section of the semiconductor substrate.

Abstract: An information management system which reduces the possibility of degradation of information management efficiency, an information management method, and an information management program are provided. In an information management system which includes a plurality of terminal devices to configured to generate detection data, a plurality of repeaters configured to acquire the detection data from at least one of the plurality of terminal devices, and a server configured to give and receive data to and from at least one of the plurality of repeaters, the plurality of repeaters respectively receive the detection data in advance from at least one of the plurality of terminal devices, the plurality of repeaters respectively hold terminal device lists, and the terminal device lists indicate at least one of the plurality of terminal devices from which the detection data is received and latest receipt time which is time at which the detection data is received.

Abstract: A reduced-complexity optical packet switch which can provide a deterministic guaranteed rate of service to individual traffic flows is described. The switch contains N input ports, M output ports and N*M Virtual Output Queues (VOQs). Packets are associated with a flow f, which arrive an input port and depart on an output port, according to a predetermined routing for the flow. These packets are buffered in a VOQ. The switch can be configured to store several deterministic periodic schedules, which can be managed by an SDN control-plane. A scheduling frame is defined as a set of F consecutive time-slots, where data can be transmitted over connections between input ports and output ports in each time-slot. Each input port can be assigned a first deterministic periodic transmission schedule, which determines which VOQ is selected to transmit, for every time-slot in the scheduling frame.

Abstract: Apparatus and methods for unified high-bandwidth, low-latency data services provided with enhanced user mobility. In one embodiment, a network architecture having service delivery over at least portions of extant infrastructure (e.g., a hybrid fiber coax infrastructure) is disclosed, which includes standards-compliant ultra-low latency and high data rate services (e.g., 5G NR services) via a common service provider. In one variant, an expanded frequency band (e.g., 1.6 GHz in total bandwidth) is used over the coaxial portions of the HFC infrastructure, which is allocated to two or more sub-bands. Wideband amplifier apparatus are used to support delivery of the sub-bands to extant HFC network nodes (e.g., hubs or distribution points) within the network. Premises devices are used to provide the 5G-based services to users at a given premises and thereabouts. In another variant, local area (e.g., “pole mounted”) radio devices are used to provide supplemental RF coverage, including during mobility scenarios.

Abstract: An accessory for wireless earbuds can include a first receiving portion defining a first cavity sized to receive and retain a first earbud and a second receiving portion defining a second cavity sized to receive and retain a second earbud. Each receiving portion can include a charging component to electrically couple with the respective earbud. The accessory can include a flexible portion connected to the first receiving portion and the second receiving portion, the flexible portion at least partially defining an internal volume, and a battery disposed in the internal volume and electrically coupled with the charging components.

Abstract: A speaker device is provided, including a circuit housing for accommodating a control circuit or a battery, an ear hook connected to the circuit housing, a core housing for accommodating an earphone core, a button, and an elastic pad. The control circuit or the battery may drive the earphone core to vibrate to generate sound. The core housing may be connected to the ear hook through a hinge component, which may rotate to change a location of the core housing relative to the ear hook, thereby making the core housing attach to a front or back of a user's ear. The button may be disposed at a button hole on the circuit housing and move relative to the button hole to generate a control signal for the control circuit. The elastic pad may be disposed between the button and the button hole and hinder a movement therebetween.

Abstract: A method performed by a portable playback device comprises receiving, via the portable playback device, a power activation indication. In response to receiving the power activation indication, power is supplied to at least one exterior visual indicator disposed on an outward-facing portion of an earcup of the portable playback device via a first power supply path of the portable playback device. A microphone activation indication associated with at least one microphone of the portable playback device is received. In response to receiving the microphone activation indication, microphone circuitry associated with the at least one microphone activated. An interior visual indicator disposed within a user-facing surface of the earcup of the portable playback device is illuminated. The interior visual indicator is positioned such that when the portable playback device is worn by a user, a state of the microphone status visual indicator is concealed.

Abstract: A loudspeaker system includes a subwoofer. The subwoofer includes a housing having a plurality of walls which together define an acoustic cavity. The plurality of walls includes a front wall, a rear wall, a top wall, a bottom wall, and a plurality of sidewalls extending between the top and bottom walls and between the front and rear walls. A first transducer mounted to the front wall of the housing. The first transducer includes a diaphragm having a major axis and a minor axis. The major axis has a fist end proximate the bottom wall and an opposite, second end proximate the top wall, such that the major axis is arranged vertical, relative to ground when the subwoofer is rested on its bottom wall. The top wall has a handle such that the loudspeaker can be carried with the major axis arranged vertical to ground.

Abstract: A method for microphone management is provided. The method includes receiving an enable secure audio indicator. In response to receiving the enable secure audio indicator, a set of computing devices are identified, and a communication is initiated to each device in the set of computing devices. The communication includes an instruction to disable a microphone associated with each respective device.

Abstract: A sound emitting device includes a speaker box, a loudspeaker, a temperature sensor, a central processing unit and a signal amplifier. The speaker box includes a sound hole. The temperature sensor detects a temperature of the sound emitting device and generates a detection signal. The central processing unit pre-stores a default audio signal. When the central processing unit determines that the loudspeaker is in a standby state and the temperature of the sound emitting device exceeds a threshold value, the central processing unit issues the default audio signal. The signal amplifier is connected to and disposed between the central processing unit and the loudspeaker for amplifying the default audio signal and transmitting the amplified default audio signal to the loudspeaker. A vibration diaphragm of the loudspeaker undergoes a vibration action according to the amplified default audio signal.

Abstract: Some disclosed devices may include a display stack, a cover layer proximate a first side of the display stack and a segmented transducer array proximate a second side of the display stack. The segmented transducer array may include a plurality of separate transducer segments. Each of the separate transducer segments may include a piezoelectric layer and a thin-film transistor (TFT) layer. The separate transducer segments may include transmitter transducer segments and receiver transducer segments. In some examples, a spacing between at least a first plurality of the transmitter transducer segments may correspond to a display stack and cover layer oscillation mode frequency in a range from 20 Hz to 20 kHz, from 15 kHz to 200 kHz or from 20 kHz to 400 kHz.

Abstract: A wearable device can provide an audio module that is operable to provide audio output from a distance away from the ears of the user. For example, the wearable device can be worn on clothing of the user and direct audio waves to the ears of the user. Such audio waves can be focused by a parametric array of speakers that limit audibility by others. Thus, the privacy of the audio directed to the user can be maintained without requiring the user to wear audio headsets on, over, or in the ears of the user. The wearable device can further include microphones and/or connections to other devices that facilitate calibration of the audio module of the wearable device. The wearable device can further include user sensors that are configured to detect, measure, and/or track one or more properties of the user.

Abstract: Embodiments of the present disclosure set forth a system that includes an audio system module. The audio system module includes a speaker, a connector, and one or more processing units. The one or more processing units are configured to detect a second audio system module connected to the connector; determine a network map of audio system modules, wherein the network map comprises at least the first audio system module and the second audio system module; determine a mode of operation based on the network map; receive an audio signal; and via the speaker, output audio corresponding to the audio signal based on the mode of operation.

Abstract: Methods, systems, and media for identifying a plurality of sets of coordinates for a plurality of devices are provided. In some embodiments, the method comprises: identifying each device in a plurality of devices associated with a user account; instructing the plurality of devices to perform an audio sequence; receiving a plurality of transit times from the plurality of devices; determining a plurality of distances based on the plurality of transit times; determining a plurality of sets of coordinates based on the plurality of distances; associating to each of the plurality of devices a corresponding unique one of the plurality of sets of coordinates; and causing at least one of the plurality of devices to play spatial audio determined from the plurality of sets of coordinates.

Abstract: A speaker diaphragm includes a first lamination region and a second lamination region. In the first lamination region, a plurality of layers are laminated in a thickness direction of the speaker diaphragm. In the second lamination region, a plurality of layers different in number from the plurality of layers in the first lamination region are laminated. The second lamination region is different from first lamination region in average density.

Abstract: The invention relates to audio transducers, such as loudspeaker, microphones and the like, and includes improvements in or relating to: audio transducer diaphragm structures and assemblies, audio transducer mounting systems; audio transducer diaphragm suspension systems, personal audio devices incorporating the same and any combination thereof. The embodiments of the invention include linear action and rotational action transducers. For both types of transducer, rigid and composite diaphragm constructions and unsupported diaphragm periphery designs are described. Systems and methods for mounting the transducer to a housing, such as an enclosure or baffle are also described. Furthermore, hinge systems including: rigid contact hinge systems and flexible hinge systems are also disclosed for various rotational action transducer embodiments.

Abstract: A method for manufacturing an electrodynamic acoustic transducer is disclosed. The electrodynamic acoustic transducer comprises a frame and/or a housing, a membrane, at least one coil and a magnet system, wherein the coil, in a cross sectional view with a coil axis being part of the sectional plane, comprises a plurality of conductive layers formed by an electrical conductor of the coil. The electrical conductor has a rectangular cross section in said cross sectional view, wherein a longer side of the rectangular cross section is substantially perpendicular to the loop axis. According to this method, a stack of conductive layers is made from the electrical conductor by stacking of separate pieces of the electrical conductor and electrically connecting the stacked separate pieces and/or by folding of the electrical conductor.