Physical noise reduction earphone for protecting hearing of children

• Main Author: HU PEILIN
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

The utility model discloses a physical noise reduction earphone for protecting hearing of children. The earmuff comprises a shell, sponge, a base plate, earmuffs and a head band, sponge is mounted inthe middle of the inner side of the shell; a backing plate is mounted at the right end inside the shell; earmuffs are mounted at the right ends of the base plates; a boss is mounted at the left end ofthe outer side of the shell; a head hoop is installed in the middle of the boss, a honeycomb structure is installed at the left end of the inner side of the shell, a convex surface structure is arranged on the inner side of the base plate, the honeycomb structure is of a regular hexagonal honeycomb sandwich structure, the honeycomb structure is used for absorbing external vibration, part of soundenergy is converted into deformation energy and heat energy, and therefore the noise reduction effect is enhanced. The propagation energy efficiency of sound waves is weakened through slope fluctuation of the convex surface st