Genelec Oy

Aki Mäkivirta

Ilpo Martikainen

Jussi Väisänen

Jussi Tikkanen

Juha Urhonen

Vesa Välimäki

Kari Pöyhönen

Siamäk Naghian

Matti Karjalainen

Poju Antsalo

Javier Gómez-Bolaños

Ville Pulkki

Jari Mäkinen

Markku Kulomäki

Juha Holm

Pekka Moilanen

Juho Väisänen

Pekka Nissinen

Thomas Lund

William Eggleston

Noa Eskelinen

Kari PÖYHÖNEN

According to an example aspect of the present invention, there is provided an audio amplifier for use with a limited power source, the audio amplifier having: a power input terminal, a signal input terminal, a first DC to DC converter having an input connected to the power input terminal, an electrical energy storage device connected to an output of the first DC to DC converter, a second DC to DC converter having an input connected to the electrical energy storage device, an amplifier conductively connected to the output of the second DC to DC converter so as to be powered by the output of the second DC to DC converter, the amplifier also being conductively connected to the signal input terminal so as to receive a signal for amplification, and an output of the amplifier configured to be connected to a transducer such that the transducer may be driven by the amplifier.

Audio amplifier for use with a limited power source

The present invention relates to a loudspeaker including an enclosure having front portion, side portions and back portion defining an inner volume, the front portion is formed as a waveguide surface and includes at least one driver in the center of the waveguide surface and is capable to radiate the main acoustic power of the loudspeaker to ambient volume in direction of first acoustic axis, and an additional driver attached to the enclosure. In accordance with the invention the additional driver is attached inside the enclosure such that a sub volume is formed inside the inner volume, the sub volume limited by the driver, spacers between the driver and the front portion, and the front portion of the enclosure, and at least one port is adapted to open from the sub volume to ambient volume either to side portion or back portion of the enclosure and at least one resonator acoustically connected to the sub volume, the resonator being tuned to at least one of unwanted resonances of the sub volume.

Directive multiway loudspeaker with a waveguide

According to an example aspect of the present invention, there is provided a method for calibrating a headphone including an amplifier with a memory and signal processing properties, the method comprising steps for determining a desired sound attributes for the headphone, and setting signal processing parameters in the amplifier in order to obtain the desired sound attributes either by measurement or based on the received input information from a user of the headphones.

Active monitoring headphone and a method for calibrating the same

According to an example aspect of the present invention, there is provided a method for forming a binaural filter for a stereo headphone in order to preserve the sound quality of the headphone, whereby the sum of the direct and crosstalk paths from loudspeakers to each ear have flat magnitude responses.

Active monitoring headphone and a binaural method for the same

According to an example aspect of the present invention, there is provided a Method for regularizing the inversion of a stereo headphone transfer function for headphone equalization, characterized by using the equation for the equalization: in which equation

Active monitoring headphone and a method for regularizing the inversion of the same

According to an exemplary aspect of the present invention, there is provided an apparatus comprising: at least one loudspeaker element, at least one processing core, at least one memory including computer program code, the at least one memory and the computer program configured to, with the at least one processing core, cause the apparatus to produce sound via the loudspeaker element, wherein the at least one processing core is configured to adjust the sound according to criteria stored in the at least one memory, wherein the criteria comprise a wide bandwidth roll-off using at least one parametric shelving filter.

Personal sound character profiler

The invention relates to a method and a loudspeaker for storing equalization settings in an active loudspeaker including a loudspeaker cabinet, at least one driver connected to the cabinet and an amplifier electronics including an equalizer, in which method the loudspeaker is calibrated in controlled conditions for forming factory calibration parameters for controlling the equalizer, the factory calibration parameters controlling the equalizer are stored in the amplifier electronics. In accordance with the invention the factory calibration parameters are also stored in a memory fixedly mounted to the loudspeaker.

Method and device for storing equalization settings in active loudspeaker

According to an example aspect of the present invention, an apparatus is provided comprising at least one processing core and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to present a graphical user interface comprising a spatial representation and at least one element, the element being associated with at least one specific physical loudspeaker, and receive input concerning moving of the at least one element within the spatial representation, activate a sensory signal in a physical loudspeaker associated with the first element, determine a location in the spatial representation where the first element is moved to, and based at least in part on the determined location, assign a name to at least the first element and the physical loudspeaker associated with the first element.

Loudspeaker control

The present invention provides a novel drive unit mounting arrangement, in which a drive unit having a chassis is mounted to a cabinet from at least two sides. The arrangement comprises a member for securing the drive unit to the cabinet from mounting points of the chassis. The arrangement further comprises a suspension member between the mounting points of the chassis and the cabinet such as to suspend the drive unit chassis elastically to the cabinet for allowing suspension in both forward and rearward directions.

Drive unit mounting arrangement and loudspeaker

In a room with strong low-frequency modes the control of excessively long decays is problematic or impossible with conventional passive means. In this patent application a systematic methodology is presented for active modal equalization able to correct the modal decay behaviour of a loudspeaker-room system. Two methods of modal equalization are proposed. The first method modifies the primary sound such that modal decays are controlled. The second method uses separate primary and secondary radiators and controls modal decays with sound fed into at least one secondary radiator. Case studies of the first method of implementation are presented.

Method for designing a modal equalizer for a low frequency sound reproduction

The present invention relates to a method for designing a modal equalizer () for a low frequency audible range, typically for frequencies below 200 Hz for a predetermined space () (listening room) and location () (location in the room) therein, in which method modes to be equalized are determined at least by center frequency and decay rate of each mode, creating a discrete-time description of the determined modes, and determining equalizer filter coefficients on the basis of the discrete-time description of the determined modes, and forming the equalizer () by means of a digital filter by defining the filter coefficients on the basis of the properties of the modes. In accordance with the invention following method steps are used: forming a mode detection function (G(&#x3a9;)), defining the highest peak angular frequency &#x3a9;of the function (G(&#x3a9;)), making AR analysis of predefined order for solving the poles of the mode representing the highest peak angular frequency, selecting the pole closest to point eon the unit circle, determining the decay time of the mode and if is over a predetermined level, designing a modal correction filter for this mode, and repeating this procedure until no decay time exceeds over the predetermined level, and each individual filter obtained in previous stages of the method is combined to a cascaded filter.

Growing community of inventors

Iisalmi, Finland

Aki Mäkivirta