Headset Microphone Positioning to Eliminate Acoustic Interference
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Solution Overview
Problem
Conventional headsets interfere with sound output due to the placement of microphones, which affects the acquisition of desired sound characteristics.
Innovation Solution
A headset design where the microphone is positioned at the back of the driver's signal outputting surface, and a sound path is created to avoid interference, allowing precise acquisition of response signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the microphone is arranged between the driver and the eardrum to acquire response signals, then the microphone can directly capture sound output, but the sound output from the driver is interfered by the microphone, such that the desired sound characteristics cannot be acquired
Solution Approach 1:
The microphone is extracted from the direct sound path between the driver and eardrum. Instead of placing it where it would interfere with the sound output, the microphone is positioned at the back of the driver, and a separate sound conduit is used to guide the sound to the microphone, thereby eliminating the interference while maintaining measurement capability
Solution Approach 2:
A sound conduit is introduced as an intermediary element to transfer sound from the driver to the microphone. This conduit acts as a mediator that allows the microphone to capture the sound output without being positioned in the direct sound path, thus avoiding interference with the driver's sound output
2Object-generated harmful factors
If the microphone is arranged outside the ear canal to avoid interference, then the sound output from the driver would not be interfered by the microphone, but the sound conduit needs to be designed fairly precisely so as not to affect the sound characteristic, complicating assembling of the sound conduit, worsening productivity, and raising cost
Solution Approach 1:
The sound conduit is merged with the housing structure of the headset. By integrating the sound conduit into the existing housing, the design eliminates the need for separate, precisely designed external conduits, thereby simplifying assembly and reducing manufacturing complexity while still avoiding microphone interference
Solution Approach 2:
The microphone is nested at the back of the driver inside the housing, utilizing the internal space of the headset structure. This nesting approach allows the microphone to be positioned without requiring external space or complex external sound conduits, simplifying the overall design
3Object-generated harmful factors
If the microphone is arranged outside the ear canal to avoid interference, then the sound output from the driver would not be interfered by the microphone, but downsizing of the headset would be difficult
Solution Approach 1:
The microphone is nested within the housing at the back of the driver, utilizing internal space rather than external space. This allows the headset to maintain a compact size while still positioning the microphone to avoid interference with the sound output
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 enables precise acquisition of response signals without interfering with the driver's output, improving sound quality and allowing for effective noise cancellation and biometric functions.
Implementation Method 1
a driver (4) for outputting a signal provided inside the housing (1)
Implementation Method 2
a microphone (5) provided at the back of a signal outputting surface of the housing (1) to acquire a response signal from a front of the driver (4)
Implementation Method 3
sound is transmitted by resonance in an open-end pipe... the resonance changes to resonance in a closed-end pipe
Data Source
AI summary
A headset of the present disclosure includes a housing 1 worn on user's ears, an ear-canal insertion portion 10 with a cylindrical shape provided at an ear-canal side of the housing 1 as a part of the housing 1, a driver 4 for outputting a signal provided inside the housing 1, and a microphone 5 provided at the back of a signal outputting surface of the housing 1 to acquire a response signal from a front of the driver 4.