Hinged Diaphragm Acoustic Receiver Volume Displacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing balanced armature acoustic receivers face limitations in volume displacement and efficiency, as they struggle to effectively convert electrical input signals into acoustic output signals with sufficient sound pressure level.
Innovation Solution
The design incorporates multiple diaphragms with torsional and cantilever hinges, where the armature is mechanically coupled to both paddles, allowing for increased air displacement and efficiency by optimizing the movement of the paddles relative to their hinges, thereby enhancing the acoustic output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single diaphragm is used in balanced armature receivers, then the device structure remains simple, but the volume displacement and acoustic output efficiency are limited
Solution Approach 1:
The single diaphragm is segmented into multiple diaphragms (first diaphragm and second diaphragm) that can move independently. Each diaphragm is coupled to the armature through separate links, allowing them to respond differently to acoustic pressure changes and thereby increasing the total volume displacement and acoustic output efficiency.
2Adaptability or versatility
If the diaphragm is rigidly fixed, then the structural stability is maintained, but the acoustic pressure control flexibility is reduced
Solution Approach 1:
The diaphragms are designed with hinge connections that allow them to rotate and pivot dynamically in response to acoustic pressure changes. The first diaphragm can rotate about a first hinge axis while the second diaphragm rotates about a second hinge axis, enabling flexible adaptation to varying acoustic conditions while maintaining structural stability through the hinge mechanism.
3Productivity
If the armature directly drives the diaphragm without mechanical coupling, then the device complexity is reduced, but the efficiency of converting electrical input to acoustic output is limited
Solution Approach 1:
Links are introduced as intermediary mechanical elements that couple the armature to the diaphragms. These links transmit and amplify the motion generated by the armature, improving the efficiency of converting electrical input signals to acoustic output while adding only minimal structural 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 significantly increases the volume displacement and efficiency of the acoustic receivers, allowing for improved sound pressure levels and more flexible control over acoustic pressure within the receiver housing.
Implementation Method 1
The receiver generally includes a motor and a coil to which an electrical excitation signal is applied. The coil is disposed about a portion of an armature (also known as a reed), a movable portion of which is disposed in equipoise between magnets, which are typically retained by a yoke. Application of the excitation or input signal to the receiver coil modulates the magnetic field, causing deflection of the reed between the magnets.
Implementation Method 2
The deflecting reed is linked to a movable portion of a diaphragm disposed within a partially enclosed receiver housing, wherein movement of the paddle forces air through a sound outlet or port of the housing.
Data Source
AI summary
Sound-producing acoustic receivers are disclosed. The acoustic receiver includes a housing, a first diaphragm, and a motor. The housing has an internal volume separated by the first diaphragm into a first front volume and a first back volume such that the first front volume has a first sound outlet. The first diaphragm includes a first paddle movable about a first hinge. The motor is disposed in the housing and includes an armature mechanically coupled to the first paddle. The first hinge is located between opposite ends of the first paddle such that actuation of the armature pivots both ends of the first paddle about the hinge.