Abstract: An electromagnetic vibrator for generating a vibration in order to transmit sound through a bone of a skull of a user to an ear of the user is disclosed. The electromagnetic vibrator comprises at least one moving part comprising a seismic mass; and at least one static part, wherein the at least one static part comprises at least one coil. Additionally a bone anchored hearing device is disclosed.

Abstract: A bone anchored hearing device includes an electromagnetic vibrator for generating a vibration in order to transmit sound through a bone of a user to an ear of the user; and a compensator for at least in part compensating a distortion in the vibration of the electromagnetic vibrator. Further, a signal processing method for a bone anchored hearing device includes providing, by an input transducer, an electric input signal representing sound of a surrounding of a user of the bone anchored hearing device; processing, by a signal processing unit, the electric input signal and providing a processed electric signal; generating, by an electromagnetic vibrator, based on the processed electric signal, a vibration in order to transmit sound through a bone of the user to an ear of the user; and at least in part compensating, by a compensator, a distortion in the vibration of the electromagnetic vibrator.

Abstract: A hydraulic pressure amplifier arrangement (1) comprising a supply port (IN), a return port (R), a high pressure port (H1), and a pressure amplifier unit (2) having a low pressure inlet (3) connected to the supply port (IN) and a high pressure outlet (4) connected to the high pressure port (H1) is described, wherein the pressure amplifier unit (2) comprises an amplification factor. In such a hydraulic pressure amplifier arrangement it should be possible to allow simply releasing off pressure at the high pressure port while keeping small unnecessary energy consumption. To this end a control valve (8) is arranged in a connection between the high pressure port (H1) and the return port (R).

Abstract: A bone anchored hearing device includes an electromagnetic vibrator for generating a vibration in order to transmit sound through a bone of a user to an ear of the user; and a compensator for at least in part compensating a distortion in the vibration of the electromagnetic vibrator. Further, a signal processing method for a bone anchored hearing device includes providing, by an input transducer, an electric input signal representing sound of a surrounding of a user of the bone anchored hearing device; processing, by a signal processing unit, the electric input signal and providing a processed electric signal; generating, by an electromagnetic vibrator, based on the processed electric signal, a vibration in order to transmit sound through a bone of the user to an ear of the user; and at least in part compensating, by a compensator, a distortion in the vibration of the electromagnetic vibrator.

Abstract: A hydraulic pressure amplifier arrangement (1) comprising a supply port (IN), a return port (R), a high pressure port (H1), and a pressure amplifier unit (2) having a low pressure inlet (3) connected to the supply port (IN) and a high pressure outlet (4) connected to the high pressure port (H1) is described, wherein the pressure amplifier unit (2) comprises an amplification factor. In such a hydraulic pressure amplifier arrangement it should be possible to allow simply releasing off pressure at the high pressure port while keeping small unnecessary energy consumption. To this end a control valve (8) is arranged in a connection between the high pressure port (H1) and the return port (R).

Abstract: The present invention relates to a photoacoustic sensor system for detecting target molecules in air samples or compressed air samples. The photoacoustic sensor system comprises an acoustic resonator forming a cylindrical resonant cavity and an air or compressed air sampling system configured for directing a flow of air or compressed air through the cylindrical resonant cavity. The photoacoustic sensor system comprises first and second microphones for generating first and second photoacoustic signals in response to absorption of modulated light within the cylindrical resonant cavity. A light source is configured to direct a modulated light beam through the cylindrical resonant cavity of the photoacoustic spectroscopy cell.

Abstract: An adaptive level estimator for providing a level estimate of an electric input signal representing sound is provided. The adaptive level estimator comprises a first level estimator that provides a first level estimate of the electric input signal in a first number K1 of frequency bands; a second level estimator that provides attack/release time constants associated with a second level estimate of the electric input signal in a second number K2 of frequency bands, wherein K2 is smaller than K1; and a level control unit that provides a resulting level estimate based on said first level estimates and said attack/release time constants associated with said second level estimates. The level estimator may be used in devices or applications that benefit from a dynamic adaptation of an input signal level to a listener's dynamic range of sound level perception, or to any other specific dynamic range deviating from that of the environment sound.

Abstract: An adaptive level estimator for providing a level estimate of an electric input signal representing sound is provided. The adaptive level estimator comprises a first level estimator that provides a first level estimate of the electric input signal in a first number K1 of frequency bands; a second level estimator that provides attack/release time constants associated with a second level estimate of the electric input signal in a second number K2 of frequency bands, wherein K2 is smaller than K1; and a level control unit that provides a resulting level estimate based on said first level estimates and said attack/release time constants associated with said second level estimates. The level estimator may be used in devices or applications that benefit from a dynamic adaptation of an input signal level to a listener's dynamic range of sound level perception, or to any other specific dynamic range deviating from that of the environment sound.

Abstract: An adaptive level estimator for providing a level estimate of an electric input signal representing sound is provided. The adaptive level estimator comprises a first level estimator configured to provide a first level estimate of the electric input signal in a first number K1 of frequency bands; a second level estimator configured to provide a second level estimate of the electric input signal and/or associated attack/release time constants in a second number K2 of frequency bands, wherein K2 is smaller than K1; and a level control unit receiving said first and second level estimates and configured to provide said resulting level estimate based on said first and said second level estimates and/or said associated attack/release time constants. The invention may e.g.

Abstract: An adaptive level estimator for providing a level estimate of an electric input signal representing sound is provided. The adaptive level estimator comprises a first level estimator configured to provide a first level estimate of the electric input signal in a first number K1 of frequency bands; a second level estimator configured to provide a second level estimate of the electric input signal and/or associated attack/release time constants in a second number K2 of frequency bands, wherein K2 is smaller than K1; and a level control unit receiving said first and second level estimates and configured to provide said resulting level estimate based on said first and said second level estimates and/or said associated attack/release time constants. The invention may e.g.

Abstract: The present invention relates to a photoacoustic sensor system for detecting target molecules in air samples or compressed air samples. The photoacoustic sensor system comprises an acoustic resonator forming a cylindrical resonant cavity and an air or compressed air sampling system configured for directing a flow of air or compressed air through the cylindrical resonant cavity. The photoacoustic sensor system comprises first and second microphones for generating first and second photoacoustic signals in response to absorption of modulated light within the cylindrical resonant cavity. A light source is configured to direct a modulated light beam through the cylindrical resonant cavity of the photoacoustic spectroscopy cell.

Abstract: An apparatus (1) is provided for manufacturing a single crystal rod (2) from a poly crystal feed rod (3), said apparatus (1) comprising a closed chamber (4), at which chamber (4) the feed rod (3) is located, said chamber (4) comprising an annular energy supply (5) arranged around the feed rod (3) for melting off the one end (23) of the rod for providing single crystals, said apparatus comprising first moving means (6) for axial movement of the feed rod (3) and second moving means (7) for a rotating relative movement between the feed rod (3) and the annular energy supply (5). The apparatus (1) comprises a monitoring system (8) for recording the distance between the surface (9) of the feed rod (3), and an annular inwardly radially facing reference face associated with the energy supply (5), and third moving means (10) for regulating the distance.

Abstract: A detector circuit to be used for measuring current and including a main current transformer and two substantially identical auxiliary current transformers, where magnetomotive forces are induced by a main current, said magnetomotive forces being counteracted by magnetomotive forces induced by a compensating current (i4) in a compensating winding (L4) across at least two annular cores (2, 3) at the same time as the two auxiliary current transformers are magnetized in antiphase by means of a modulation signal, said circuit further including a synchronous rectifier for providing an adjustment signal for the compensating current (i4). According to the invention, the compensating winding (L4) is formed by a so-called “pilgrim winding”.

Abstract: A double-acting hydraulic pressure intensifier includes a supply connection, a return connection, a high-pressure connection. An intensifier piston assembly includes a low-pressure piston arranged in a low-pressure cylinder and two high-pressure pistons connected to the low-pressure piston each arranged in a high-pressure cylinder. A switching valve assembly includes a displace able, hydraulically controlled valve element which on its two opposite sides in the direction of displacement has control pressure chambers with pressure application areas of different sizes, namely, a first control pressure chamber with a smaller pressure application area and a second control pressure chamber with a larger pressure application area. A stop plug is arranged between the second control pressure chamber and the supply connection.

Abstract: A hydraulic pressure intensifier includes a supply connection, a return connection, and a high-pressure connection. An intensifier piston assembly includes a high-pressure cylinder with a high-pressure piston displaceable therein and a low-pressure cylinder having a greater cross-section than the high-pressure cylinder, with a low-pressure piston which is displaceable therein. The low-pressure piston is connected to the high-pressure piston and divides the low-pressure cylinder into a first low-pressure chamber on the side of the high-pressure piston and a second low-pressure chamber. A switching valve acts on the second low-pressure chamber with pressure from a pressure source or relieves it of pressure.

Abstract: A method for production of a layered product including at least two layers, a first primary layer and second mouldable layer, wherein a continuous supply of a primary layer material and a supply of mouldable material are provided and wherein the primary layer material and the mouldable material are combined in moulding cavities, wherein the moulding cavities are placed in an endless loop, and the mouldable material and the primary layer are combined by placing the mouldable material on the primary layer about and/or in communication with the moulding cavities.

Abstract: A hydraulic pressure intensifier includes a supply connection, a return connection, and a high-pressure connection. An intensifier piston assembly includes a high-pressure cylinder with a high-pressure piston displaceable therein and a low-pressure cylinder having a greater cross-section than the high-pressure cylinder, with a low-pressure piston which is displaceable therein. The low-pressure piston is connected to the high-pressure piston and divides the low-pressure cylinder into a first low-pressure chamber on the side of the high-pressure piston and a second low-pressure chamber. A switching valve acts on the second low-pressure chamber with pressure from a pressure source or relieves it of pressure.

Abstract: A double-acting hydraulic pressure intensifier includes a supply connection, a return connection, a high-pressure connection. An intensifier piston assembly includes a low-pressure piston arranged in a low-pressure cylinder and two high-pressure pistons connected to the low-pressure piston each arranged in a high-pressure cylinder. A switching valve assembly includes a displace able, hydraulically controlled valve element which on its two opposite sides in the direction of displacement has control pressure chambers with pressure application areas of different sizes, namely, a first control pressure chamber with a smaller pressure application area and a second control pressure chamber with a larger pressure application area. A stop plug is arranged between the second control pressure chamber and the supply connection.

Abstract: Methods of imaging bone provide diagnostic information relating to arthritic conditions by comparing the relative bone density in areas closer to and further removed from a potentially arthritic joint with similar relative bone densities indicative of arthritic condition such as rheumatoid arthritis. The joint may be metacarpal, finger or toe joint.