46results about How to "Reduce howling" patented technology

Disclosed is a wireless MIC system for automatically paring, which comprises a wireless MIC which includes a paring button at its one side and facilitates a connection mode as it is automatically paired with an amplifier by transmitting a paring request signal when the paring button is on, and initializes a connection related information stored in a storing part when the connection mode is cancelled and converts an acoustic signal into a digital audio signal and transmits to the paired amplifier; and an amplifier which facilitates a connection mode as the wireless MIC and the amplifier are paired by setting a transmission and receiving channel of the amplifier and the wireless MIC, and amplifies a digital audio signal from the wireless MIC and outputs in an acoustic form.

A clutch gear (40) is formed, and several mass dampers (30) are coupled to the clutch gear to split the mode of vibration for the clutch gear during engagement. A lubrication dam is formed between the clutch gear and the mass damper. A receptor is formed in the clutch gear to partially fit the mass damper. An independent claim is included for vehicle transmission clutch assembly.

The invention provides a compact structure of a liquid reservoir and a gas-liquid separator for a refrigeration / air-conditioning system. The structure comprises an inner shell, an outer shell, an air inlet pipe, an air outlet pipe, a liquid supply inlet pipe, a liquid supply outlet pipe and a connection component, wherein the inner shell is fixed in the outer shell through the connection component; a cavity in the outer shell is divided into a liquid storage cavity and a gas-liquid separating cavity; the outer ends of the air inlet pipe and the air output pipe stretch out of the outer shell; the inner ends of the air inlet pipe and the air output pipe stretch into the gas-liquid separating cavity; the air outlet pipe is a U-shaped pipe; the inner port is an inclined port and an oil returnhole and a balanced hole are formed in the inner port; the air inlet pipe is an L-shaped pipe; the inner port of the air inlet pipe and the inner port of the air outlet pipe are arranged in a staggering manner; the outer ends of the liquid supply inlet pipe and the liquid supply outlet pipe stretch out of the outer shell; the inner ends of the liquid supply inlet pipe and the liquid supply outletpipe stretch into the liquid storage cavity; the inner port of the liquid supply inlet pipe is arranged above the inner shell; the liquid supply outlet pipe is an L-shaped pipe; the inner port of theliquid supply output pipe is an inclined port; and the connection component is cylindrical. The compact structure has the advantages of increasing the comprehensive efficiency, utilizing the inner volume in multiple aspects, reducing the system mounting space, reducing the cost of parts and the like.

The present application provides a feedback filter design method, a design device and an earphone, to obtain the transfer function of the secondary channel of the earphone in at least one working state; based on the transfer function of the secondary channel, determine the A nominal system transfer function and a first weighting function of the earphone; a second weighting function is determined based on the noise reduction expectation of the earphone; a second weighting function is determined based on the first weighting function, the second weighting function, and the nominal system transfer function that determines the parameters of the feedback filter. Compared with the design method of the feedback filter in the prior art, the present application determines the parameters of the feedback filter through the transfer function of the secondary channel under various working conditions, so that the earphone remains stable under various working conditions, reducing The appearance of howling enhances the robustness while keeping the noise low.

The invention discloses an asymmetrical high-frequency sound wave controller with an angle adjustable. The asymmetrical high-frequency sound wave controller with the angle adjustable comprises a conic core a, a conic core b, a shell a, two baffles x and two baffles y. The conic core a is a cone with a concave-convex surface and the conic core b is an irregular circular truncated cone which is obtained in the mode that the circular truncated cone is symmetrically cut along the diameter of the end face of the larger end in an inclined mode. The irregular circular truncated cone is composed of a semicircular truncated cone x with a concave surface and a semicircular truncated cone y with a convex surface. The semicircular truncated cone x is cut in an inclined mode so that two symmetrical 1 / 4-oval surfaces x can be obtained and the semicircular truncated cone y is cut in an inclined mode so that two symmetric 1 / 4-oval surfaces y can be obtained. The shell a is arranged on the conic core a in a sleeved mode, the small diameter end and the large diameter end of the shell a correspond to the conic node position and the conic bottom position of the conic core a respectively. A high-pitch inlet of the asymmetrical high-frequency sound wave controller is a circular plane, high pitch passes through a gap between the conic core a and the shell a and then is emitted and makes contact with natural space, and the baffles only guide the high pitch in part of the natural space, so that an outlet becomes a C-shaped stereoscopic face facing upwards, forwards and downwards, and therefore the work efficiency of a voice box is high.