Hybrid Receiver Bracket Venting for Pressure Relief and Wider Bandwidth
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Solution Overview
Problem
Existing hybrid receivers face issues with air pressure differentials causing ear fatigue due to blocked airflow between the upper and lower spaces, and the frequency range of tweeter speakers is limited, requiring an extended back volume for improved sound reproduction.
Innovation Solution
A hybrid receiver design with a bracket that allows communication between the upper and lower spaces through a communicating hole, featuring a second driver with increased back volume and adjustable airflow, and sound emission aligned with the first driver, utilizing a microspeaker with an FPCB diaphragm and a piezoelectric speaker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bracket insulates the upper and lower spaces to block air flow, then the mechanical structure is stable, but air pressure differentials cause ear fatigue
Solution Approach 1:
The bracket is segmented into multiple functional regions: a first driver receiving space for the woofer, a second driver receiving space for the tweeter, and a communicating hole that selectively connects air passages. This segmentation allows the bracket to simultaneously provide structural stability while enabling controlled air flow between upper and lower spaces to equalize pressure and prevent ear fatigue.
2Volume of stationary object
If the back volume of the tweeter speaker is limited, then the bracket structure is compact, but the frequency range is restricted
Solution Approach 1:
The tweeter speaker is nested within the bracket's second driver receiving space, with its back volume extended by utilizing the space above the first driver's diaphragm. The communicating hole in the bracket connects the tweeter's back volume to the upper space, effectively expanding the available air volume for the tweeter without increasing the overall bracket size, thereby extending the frequency range down to 3 kHz.
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 design reduces ear fatigue by equalizing air pressure and enhances sound reproduction across a wider frequency range, particularly at low frequencies, with improved sound pressure levels.
Implementation Method 1
a communicating hole is formed in the side wall of the bracket, through which air flow in or out of the upper space of the diaphragm of the first driver
Implementation Method 2
the hybrid receiver may further comprise a mesh attached to the communicating hole, the airflow of which is adjustable
Implementation Method 3
a first driver for reproducing sound in a first frequency range
Implementation Method 4
a second driver for reproducing sound in a second frequency range which is higher than the first frequency range
Data Source
AI summary
A hybrid receiver includes: a first driver configured to reproduce sound in a first frequency range; a second driver configured to reproduce sound in a second frequency range which is higher than the first frequency range; and a bracket having a side wall covering a side of the first driver, an upper side attached to a top of a diaphragm of the first driver, and a sound emitting hole formed in the upper side and configured to emit sound produced by the first driver. A second driver receiving space is provided in the upper side of the bracket. A back hole of the second driver communicates with an upper space of the diaphragm of the first driver. A communicating hole is formed in the side wall of the bracket and through which air flows in or out of the upper space of the diaphragm of the first driver.