3results about How to "Avoid howling" patented technology

The present application relates to the technical field of steam humidifier, and discloses a noise reduction structure of steam humidifier convenient to install and a use method, the noise reduction structure of steam humidifier convenient to install, including installation ring, both sides of the installation ring are fixedly connected with lower side plate, the inside of the lower side plate is provided with clamping groove, the side of the installation ring is hingedly connected with upper cover, both sides of the upper cover are fixedly connected with upper side plate, the opposite side of two installation plates is fixedly connected with support rod, the outer wall of the support rod is symmetrically slidably connected with sliding block, the opposite side of two sliding blocks is fixedly connected with spring one, the outer wall of the sliding block is slidably connected in the sliding groove, and the bottom of the sliding block is fixedly connected with clamping block.Under the reaction force of spring one, the sliding block is away from each other along the support rod, drives the clamping block to be away from each other and is clamped in the clamping groove, without using a variety of tools, and the installation of the upper cover can be completed only by simple operation.

The application provides an acoustic echo cancellation method and a Bluetooth intercom system, and is applied to a slave device in the Bluetooth intercom system. The method comprises the following steps: sending first voice data to a master device according to a current voice frame collected, wherein the first voice data comprises a voice identifier corresponding to the current voice frame, a device identifier of the slave device and encoded voice of the current voice frame; storing the current voice frame and the voice identifier corresponding to the current voice frame as local data in a local cache area; receiving second voice data sent by the master device, wherein the second voice data comprises a voice identifier associated with the device identifier of each slave device and encoded voice of multi-path combination; performing acoustic echo cancellation processing on the encoded voice of multi-path combination in the second voice data according to the second voice data and the local data, obtaining processed voice, and playing the processed voice, so as to improve the acoustic echo cancellation processing effect.

The application provides an air conditioner box air door structure capable of preventing howling and abnormal sound, comprising an air door shaft and an air door plate arranged on the air door shaft, the air door plate is integrally formed with the air door shaft, and a soft rubber sleeve is arranged on the air door plate; a plurality of equidistantly arranged trapezoidal blocks are arranged on the soft rubber sleeve, the trapezoidal blocks are made of the same material as the soft rubber sleeve, and the trapezoidal blocks are integrally formed with the soft rubber sleeve. The air conditioner box air door structure capable of preventing howling and abnormal sound can guide the air flow during the closing of the air door, so that the howling is avoided, the air door can be buffered when the air door is closed, the impact sound of the air door is avoided, and the user comfort is improved.