Zeolite spherical porous sound absorption particle, and application thereof in mobile phone loudspeaker system

Abstract

The invention provides a zeolite spherical porous sound absorption particle, and application thereof in a mobile phone loudspeaker system. The zeolite spherical porous sound absorption particle comprises zeolite porous particles and an adhesive; the zeolite porous particles are bonded together by the adhesive to form the porous spherical particle with abundant macroporous channels; and the main elements of the zeolite porous particles are silicon, oxygen and aluminum, and the mass ratio of silicon to aluminum is at least 150. As a sound absorption material, the zeolite spherical porous sound absorption particle can effectively solve the powder falling problem and the irreversible aging problem caused by high-temperature and high-humidity conditions, the reduction amplitude of the resonant frequency of the mobile phone loudspeaker is increased towards the lower frequency, and the bass effect is obviously improved; and the resonant space is virtually increased, and the resonant frequency of the loudspeaker can be reduced by 100 Hz or above.

Description

technical field [0001] The invention belongs to the technical field of loudspeakers for mobile phones, and relates to a zeolite spherical porous sound-absorbing particle and its application in a mobile phone loudspeaker system. Background technique [0002] With the development of smart phone technology, mobile phone equipment is becoming more and more miniaturized, thinner and more intensive, which leads to the miniaturization of the mobile phone speaker as an important component, which leads to further compression of its resonance space. Sound quality will be affected to some extent. [0003] Mobile phone speakers (hereinafter referred to as speakers) generally include a sounding unit, a housing and a relatively closed resonance space. The acoustic effect can be improved by conventionally adding sound-absorbing materials, such as porous materials such as activated carbon or zeolite. The sound-absorbing material in the resonant space of the speaker causes a significant vir...

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Problems solved by technology

One problem is the aging of sound-absorbing materials, especially the irreversible aging caused by high-temperature and high-humidity conditions, which leads to a significant decrease in acoustic performance; the other problem is that the strength and toughness of sound-absorbing materials are not enough. Due to long-term vibration, it is easy to produce powder falling and damage the electronic components of the speaker. Although this can be protected by adding devices such as diaphragms, it will inevitably affect the sound quality of the speaker. Of course, the root of the problem of powder falling is mainly in the Forming process, directly related to binder and granulation process

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