Acoustic Device Buffer Reducing Sound-Absorbing Material Collision Noise
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Solution Overview
Problem
The collision of sound-absorbing material with metallic enclosure housings in acoustic devices generates noise, adversely affecting acoustic performance.
Innovation Solution
An acoustic device with a metal enclosure housing and an isolation component having a mesh structure buffer attached to its inner surface to reduce noise, forming a filling cavity filled with sound-absorbing material, which separates the rear sound cavity into two parts to minimize material collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic enclosure housing is used, then the structural strength and durability are improved, but noise is generated from collision of sound-absorbing material with the metallic housing
Solution Approach 1:
A buffer component is introduced as an intermediary element between the sound-absorbing material and the metallic enclosure housing. The buffer is attached to the inner surface of the metallic housing and serves as a mediator that prevents direct contact and collision between the sound-absorbing material and the metallic surface, thereby reducing noise generation while preserving the structural strength of the metallic housing.
Solution Approach 2:
The interior space of the enclosure housing is segmented into different functional zones: a front sound cavity for acoustic output, a rear sound cavity for acoustic resonance, and a filling cavity containing the buffer and sound-absorbing material. This segmentation allows the metallic housing to maintain its structural integrity while the buffer isolates the sound-absorbing material to prevent noise-generating collisions.
2Volume of stationary object
If sound-absorbing material is filled in the rear sound cavity, then the effective volume is increased, but collision noise with the metallic housing is generated
Solution Approach 1:
The buffer acts as a mediator placed between the sound-absorbing material and the metallic housing within the filling cavity. It allows the sound-absorbing material to be present in the rear sound cavity to increase effective volume while preventing direct collision with the metallic housing, thus eliminating the source of noise.
Solution Approach 2:
The buffer is strategically positioned in specific locations within the filling cavity where collision noise is most likely to occur. By applying the buffer locally at these critical positions, the patent effectively reduces collision noise while still allowing sufficient sound-absorbing material to be present in the rear sound cavity to maximize effective volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The buffer effectively reduces noise generated from the collision of sound-absorbing material with the metallic enclosure, thereby enhancing the acoustic performance of the device.
Implementation Method 1
the buffer is configured to reduce noise generated from collision of the sound-absorbing material with the enclosure housing
Implementation Method 2
the rear sound cavity is provided with a filling cavity configured to be filled with a sound-absorbing material, so as to increase an effective volume of the rear sound cavity
Data Source
AI summary
Provided is an acoustic device, having front and rear surfaces. The acoustic device includes: an enclosure housing being a metal housing; an acoustic component mounted in the enclosure housing, the acoustic component and the enclosure housing cooperate to form front and rear sound cavities, and the front sound cavity is communicated with the sound outlet; an isolation component mounted in the rear sound cavity, the isolation component and the enclosure housing enclose to form a filling cavity configured to be filled with a sound-absorbing material; and at least one buffer attached to an inner surface of the enclosure housing defining the filling cavity, the buffer is configured to reduce noise generated from collision of the sound-absorbing material with the enclosure housing. The acoustic device can reduce collision of the sound-absorbing material with the metallic enclosure housing, thereby reducing noise generated, so as to improve acoustic performance.