2results about How to "Loud volume" patented technology

The utility model relates to the technical field of communication masks, in particular to a communication mask with a built-in sound transmission diaphragm cover and a Bluetooth microphone, which comprises a base body, a mirror surface mounted on the outer side of the base body, a clamping groove formed in the lower side of the mirror surface, and a respirator fixed on the inner wall of the clamping groove, the inner wall of the clamping groove is attached to the outer side of the respirator, a cover plate is fixed to the inner side of the respirator, and a Bluetooth microphone is detachably fixed to the side wall of the cover plate. According to the invention, the installation position of the Bluetooth microphone is changed, and the obstruction of the communication mask to the sound of firefighters is reduced, so that the sound transmitted by the Bluetooth microphone is increased, the noise is reduced, and the communication accuracy of the firefighters is improved.

This utility model discloses a speaker sound outlet cavity structure, including a sound outlet cavity, a speaker, and a pad. The speaker is installed at the upper end of the sound outlet cavity, and the pad is installed at the lower end of the sound outlet cavity. The upper side of the pad has several spaced-apart recesses. One side of the sound outlet cavity has a sound outlet. The speaker and the pad are vertically opposite each other, with the speaker's sound output direction facing the upper side of the pad. The sound emitted by the speaker is reflected by the upper side of the pad and the recesses of the pad before being output from the sound outlet. This utility model can further improve sound loudness and bass effect, and can make the emitted sound have a stereo surround sound effect.