Microphone Resonator Layout for Cavity Resonance Suppression
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Solution Overview
Problem
The integration of microphones into compact electronic devices is challenging due to resonance effects within resonant cavities within the device housing, which disrupt or suppress audio inputs at specific frequencies.
Innovation Solution
The implementation of modified housing components with non-closing edges, partial filling of cavities with damping materials, and the incorporation of resonators, such as Helmholtz resonators, separate from the microphone, to ameliorate resonance effects and prevent the formation of resonant cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If microphones are integrated into compact electronic devices, then device portability is improved, but resonance effects within cavities disrupt or suppress audio inputs at specific frequencies
Solution Approach 1:
The patent introduces resonators that generate counter-resonance to cancel the harmful resonance effects. By creating a resonant system that produces opposite phase vibrations, the harmful resonance is converted into a beneficial cancellation effect, allowing compact device design without audio degradation
Solution Approach 2:
The resonator acts as an intermediary element between the harmful resonance source and the microphone. It mediates the acoustic field by introducing counter-vibrations that neutralize the harmful resonance before it reaches the microphone, protecting audio input quality in compact form factors
2Reliability
If resonators are incorporated to ameliorate resonance effects, then audio input quality is improved, but device complexity increases
Solution Approach 1:
The resonator structure is designed to serve multiple functions: it acts as both a structural component of the device housing and an acoustic element for resonance cancellation. This multi-functionality reduces the need for additional dedicated resonance control components, thereby limiting the increase in device complexity
Solution Approach 2:
The patent merges the resonator with existing device structures such as the housing or internal components. By integrating the resonance cancellation function into existing structural elements rather than adding separate dedicated components, the overall device complexity is minimized while still achieving audio quality improvement
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
These solutions effectively reduce or eliminate the negative impact of resonant cavities on microphone performance, enhancing audio input quality in compact electronic devices by minimizing resonance disruptions.
Implementation Method 1
resonance effects within resonant cavities within the device housing, which disrupt or suppress audio inputs at specific frequencies
Implementation Method 2
the incorporation of resonators, such as Helmholtz resonators, separate from the microphone, to ameliorate resonance effects
Implementation Method 3
partial filling of cavities with damping materials
Data Source
AI summary
Aspects of the subject technology relate to electronic devices having microphones. An electronic device may include a microphone and a resonator for the microphone. The resonator may be formed in a device structure that is spatially separated from the microphone. The resonator may be formed in an interior wall of a housing of the electronic device, or in a support structure within an enclosure of the electronic device. A resonator and/or one or more damping features, may reduce a resonance effect, on the microphone, of a resonant cavity within the enclosure of the electronic device and adjacent the microphone.