摘要:
Between ITE hearing aids for binaural hearing assistance, energy-saving communication is made possible by disposing an antenna device with a preferred direction of transmission in the hearing aid housing such that, in a state in which the hearing aid is attached to or inserted one ear of the patient, the preferred direction of transmission is substantially toward the other ear of the patient. In this way it is ensured that the directions of transmission of the two hearing aids in the fitted state lie substantially on a straight line, so that optimum transmission can be achieved.
摘要:
A direction-sensitive hearing aid is provided with a housing, at least one signal processor, at least one microphone in communication with the signal processor as well as at least one sound opening. A simplified arrangement of operating elements is provided as well as effective shielding from electromagnetic disturbances with a continued, good directional effect given improved protection against contamination. The hearing aid is provided with a sound channel. The sound channel has at least two openings, and at least two microphones are positioned along the sound channel via which the sound within the sound channel can be acquired. The direction of the sound can be determined based on the differences in sound transit time within the sound channel.
摘要:
For a simplified construction of a hearing aid device with respect to switch, control and regulating elements, one or more pressure or pressure and position sensors, which are constructed in a film-like structure to react with variable resistance, are composed of laminated polymer layers wherein one layer is coated with interdigital electrodes and the appertaining other layer is coated with semiconductor material. The sensor elements are arranged on either the outside or inside of the housing or can be arranged on a structural member, such as a carrier situated within the housing. The sensor or sensor elements, respectively, can be fashioned as part of the switches or as regulators for the operation of the device.
摘要:
A method and an apparatus are proposed for control of gear changing under load in a transmission of a vehicle driven by an internal combustion engine. In all gear changing instances, the hydraulic pressure upon the frictionally engaged elements is established with a constant slippage time proportionally to the sum of the engine torque and the product of the engine speed and a constant factor. The constant factor depends on the slippage time and on the gear changing instance (FIG. 1).
摘要:
To control transmission ratio of a continuously variable transmission connected to a combustion engine (e.g., for optimal fuel efficiency of a powered vehicle), effective diameter of pulleys is controlled in response to an electrical signal. A control signal suitable for comparison with hydrostatic pressure values is produced by a computing device based on input signals representing load, speed, and other operating conditions and based further on stored data representing engine characteristics. A control signal is conveniently used to control hydrostatic pressure by means of electromagnetically operated valves. Especially when pulsed valves controlled by digital electric signals are used, a reservoir is used to establish a steady hydrostatic pressure. Such control device is readily adapted to different engines by replacement of stored characteristic data.
摘要:
The invention pertains to a hydraulic control system for servos in automatic transmissions, which, in a known fashion, utilizes a main pressure valve to regulate the pressure within the control system and further utilizes a converter pressure valve to supply a hydrodynamic torque converter and the lubrication system. The servos (for example, the clutches) utilized in this type of automatic transmissions cooperate with electromagnetically actuated pressure regulating valves have a current-proportional response. These electromagnetic valves are actuated by electronic control signals generated by sensors which monitor various parameters during operation, making previously utilized sensors superfluous. By control of the pressure regulating valves the forward gear, the reverse gear or the neutral gear can be engaged in the simplest fashion. By means of a magnet valve associated with the main pressure valve the levels of pressure may be varied. It is also possible, via simple associated elements, to install an emergency system which during a failure of the electrical system allows the transmission to continue to operate.