A cochlear implant muffler for noise control of ventilation pipelines

Abstract

The invention discloses an artificial cochlea silencer used for ventilation pipeline noise control. The artificial cochlea silencer comprises a front connection pipe, a cavity pipe and a rear connection pipe; two ends of the cavity pipe are separately connected with the front connection pipe and the rear connection pipe; an annular bionic filtering sheet is sleeved in the cavity pipe; a resonant cavity is formed between the cavity pipe and the annular bionic filtering sheet; two ends of the annular bionic filtering sheet are separately in butt joint with the front connection pipe and the rear connection pipe, so that a filtering passage is formed; lacunose sound absorption sheets penetrate through the filtering passage axially; and the multiple lacunose sound absorption sheets are circumferentially and uniformly distributed along the central axis of the cavity pipe and longitudinally divide the filtering passage into multiple cavities. The artificial cochlea silencer is simple in structure; omnibearing and three-dimensional noise reduction in the pipeline is realized; the artificial cochlea silencer is not limited by noise frequency bands; a large resonant cavity is not needed; the artificial cochlea silencer is especially applicable to complex ventilation pipelines in each system on ships; and the noise reduction effect is improved.

Description

technical field [0001] The invention relates to the technical field of pipeline noise control, in particular to a cochlear implant muffler used for ventilation pipeline noise control. Background technique [0002] As one of the "four major pollutions" in the contemporary world, the control of noise pollution has been widely concerned by domestic and foreign research institutions. Noise in the daily life environment and working environment can cause people's emotional irritability and inattention, and long-term exposure to high-noise environments can cause damage to the human auditory system. Similarly, for equipment and machinery, the structural vibration phenomenon caused by long-term noise excitation will reduce the working accuracy and reduce their fatigue life. In the military field, mechanical noise will directly affect the concealment of military equipment, expose itself to the enemy, and interfere with the normal operation of one's own acoustic instruments and high-p...

AI Technical Summary

Problems solved by technology

The common problems of the above-mentioned anti-type noise reduction devices are: the structure is bulky and the installation space is limited; the frequency selectivity is strong, and the noise reduction effect is the best only when resonance occurs, and the noise reduction effect will be greatly weakened if the frequency is slightly deviated, etc.

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