RF Shield Speaker Enclosure Acoustic Tuning
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Solution Overview
Problem
Current wireless handheld mobile communication devices face challenges in enhancing acoustic properties of speakers due to size and space constraints within the device's housing, particularly in tuning the acoustic response and reducing back-wave noise.
Innovation Solution
The system incorporates an enclosure, such as a radio frequency (RF) shield, which defines a volume and includes an aperture connecting the speaker to this volume, allowing for the adjustment of acoustic properties by creating an air channel and reducing acoustic 'short circuits' between the front and back sides of the speaker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an enclosure is added to enhance acoustic properties of the speaker, then acoustic response is improved, but device size and complexity increase
Solution Approach 1:
The patent combines the RF shield (electromagnetic shielding component) with the speaker enclosure (acoustic component) into a single integrated structure. The RF shield serves dual functions: providing electromagnetic shielding for sensitive electronics and acting as the speaker enclosure to manage acoustic properties. This merging eliminates the need for a separate acoustic enclosure, reducing device complexity while maintaining improved acoustic response.
2Reliability
If a separate enclosure is provided for the speaker, then acoustic properties are enhanced, but available space within housing is reduced
Solution Approach 1:
The RF shield is designed to perform multiple functions simultaneously: electromagnetic shielding, speaker enclosure, and acoustic tuning chamber. By making the RF shield universal and multi-functional, the patent eliminates the need for additional dedicated space for a separate speaker enclosure, thereby preserving available space within the device housing while still enhancing acoustic properties.
3Device complexity
If the speaker is mounted directly to the housing, then device complexity is reduced, but back-wave noise increases due to acoustic short circuits
Solution Approach 1:
The RF shield acts as an intermediary structure between the speaker and the device housing. Instead of mounting the speaker directly to the housing (which creates acoustic short circuits), the speaker is mounted to the RF shield, which provides acoustic isolation and manages back-wave propagation. This intermediary structure reduces back-wave noise while maintaining simple device complexity.
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
This configuration effectively tunes the acoustic response of the speaker, reducing back-wave noise and enhancing performance by utilizing the existing components within the device's housing to create an enclosure that adjusts the acoustic properties without the need for additional enclosures, optimizing space and reducing noise interference.
Implementation Method 1
the enclosure defines a volume and includes an aperture connecting the speaker to this volume, allowing for the adjustment of acoustic properties
Data Source
AI summary
The disclosure relates to a system for adjusting a response signal of a transducer of an electronic device is provided. The system comprises: a substrate, such as a printed circuit board (PCB), having a first side and a second side; a transducer making an electrical connection with the first side of the PCB; and an enclosure mounted on the second side of the PCB. The enclosure defines a volume by an interior space of the enclosure and the second side of the PCB. In the system, the PCB, the transducer and the enclosure are contained within a housing for the device; and the transducer is in communication with the volume.