Headphone Equalization Using Impedance and Image Identification
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Solution Overview
Problem
Existing sound transducers, such as headphones, often suffer from degraded audio quality due to mismatched frequency responses, and current methods for improving audio quality are cumbersome, limited, or require professional equipment and expertise.
Innovation Solution
An apparatus and method for automatically identifying sound transducers using image recognition, impedance measurement, or audio connection-based identification to determine appropriate equalization parameters, allowing for user-friendly and efficient audio signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If professional equipment and expertise are used to measure frequency responses, then measurement precision is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent replaces complex acoustic measurement equipment (dummy heads, acoustic couplers, professional measurement hardware) with electrical impedance measurement systems. Instead of using mechanical/acoustic methods to measure frequency response, the system uses electrical impedance characteristics to identify headphone models and retrieve corresponding equalization parameters, thereby simplifying the measurement process while maintaining accuracy.
Solution Approach 2:
The patent introduces an intermediary approach by using impedance measurement as a proxy for frequency response measurement. Rather than directly measuring the complex acoustic frequency response, the system measures electrical impedance (a simpler intermediate parameter) to identify the headphone model, then uses this identification to select appropriate equalization parameters from a database.
2Measurement precision
If professional equipment is required for measuring frequency responses, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent replaces complex acoustic measurement equipment (dummy heads, acoustic couplers, professional measurement hardware) with electrical impedance measurement systems. Instead of using mechanical/acoustic methods to measure frequency response, the system uses electrical impedance characteristics to identify headphone models and retrieve corresponding equalization parameters, thereby simplifying the measurement process while maintaining accuracy.
Solution Approach 2:
The system enables end users to perform equalization setup themselves without requiring professional assistance. By using automated impedance-based identification and database lookup, the system allows consumers to independently measure, identify, and configure equalization parameters for their headphones, making the process accessible to non-experts.
3Adaptability or versatility
If standardized interfaces are used for headphone compatibility, then adaptability is improved, but audio quality deteriorates
Solution Approach 1:
The patent changes the equalization parameters dynamically based on the identified headphone model. Instead of using fixed equalization settings, the system measures impedance, identifies the specific headphone model, and retrieves model-specific equalization parameters from a database, thereby optimizing audio quality for each device while maintaining broad compatibility through the standardized identification process.
Solution Approach 2:
The system transitions from static, pre-configured equalization settings to dynamic, adaptive equalization. The equalization parameters are not fixed but are determined at runtime based on the actual headphone model detected through impedance measurement, allowing the system to adapt to different devices while maintaining compatibility through the standardized identification approach.
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
Enhances audio quality by providing tailored equalization for a wide variety of sound transducers, improving user satisfaction without requiring manual intervention or specialized equipment.
Implementation Method 1
an apparatus for processing an audio signal for reproduction by a sound transducer
Implementation Method 2
a sound transducer identification configured to identify a sound transducer using an image recognition
Implementation Method 3
a sound transducer identification configured to identify a sound transducer using an identification signal which is provided by the sound transducer via an audio connection
Data Source
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AI summary
An apparatus (100) for processing an input audio signal (122) for reproduction by a sound transducer (130) comprises an equalization parameter determinator (110) for determining a set of equalization parameters (112) and an equalizer (120) configured to equalize the input audio signal (122), to obtain an equalized audio signal (124). Different concepts for the determination of the set of equalization parameters (112) comprise an image recognition, an evaluation of an identification signal which is provided by the sound transducer via an audio connection, and a measurement of the impedance of the sound transducer over frequency. Also, an upload functionality and a download functionality are provided.