Adaptive Electroacoustic Transducer Control for Housing-Induced Sound Quality
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Solution Overview
Problem
Existing electroacoustic transducers, such as piezoelectric speakers, face challenges in producing high-quality sound due to varying housing designs and environmental conditions, requiring adaptive systems to optimize sound-producing characteristics.
Innovation Solution
A system comprising electroacoustic transducers, an acoustoelectric transducer, and a computing device that applies patterns of electrical signals to test sound-producing characteristics, determining and controlling these characteristics to generate predetermined sounds, using driver circuitry and control logic to optimize sound production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If piezoelectric speakers are used in small electronic devices with protective housings, then the speaker is protected from environmental damage, but the sound quality deteriorates due to housing design constraints
Solution Approach 1:
The system dynamically adjusts electrical signal parameters (frequency, amplitude, duration) based on real-time feedback from acoustic sensors to compensate for housing-induced sound quality variations, allowing the speaker to adapt to different housing designs while maintaining protection
Solution Approach 2:
Acoustic sensors detect the actual sound output and environmental conditions, feeding this information back to the control system which then adjusts the electrical signals to optimize sound production despite housing constraints
2Adaptability or versatility
If housing design requirements vary for different devices, then the speaker can be adapted to different applications, but consistent sound quality becomes difficult to achieve
Solution Approach 1:
The control system changes electrical signal parameters (frequency, amplitude, pulse width) based on detected environmental conditions and housing characteristics, enabling the same speaker to produce consistent sound quality across different housing designs and devices
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
Enables adaptive control of electroacoustic transducers to produce high-quality sound across different housing designs and environmental conditions, ensuring consistent sound quality in small electronic devices.
Implementation Method 1
A common speaker type is the dynamic speaker which includes a coil of wire held in a circular space between poles of a permanent magnet. On application of an alternating current (AC) electrical audio signal to the wire coil, the coil moves rapidly back and forth.
Implementation Method 2
A piezoelectric speaker is a type of speaker that takes advantage of the piezoelectric effect for generating sound. Generally, a piezoelectric speaker operates when a voltage is applied to a piezoelectric material to cause motion of the piezoelectrical material.
Implementation Method 3
an acoustoelectric transducer configured to convert sound produced by the electroacoustic transducers into one or more electrical signals
Data Source
AI summary
Systems and methods for determining sound-producing characteristics of electroacoustic transducers are disclosed. According to an aspect, a system includes electroacoustic transducers configured to generate sound. The system also includes an acoustoelectric transducer configured to convert sound produced by the electroacoustic transducers into one or more electrical signals. Further, the system includes a computing device configured to apply one or more patterns of electrical signals to the electroacoustic transducers to test for one or more sound-producing characteristics. The computing device is also configured to receive, from the acoustoelectric transducer, electrical signals that resulted from application of the patterns of electrical signals to the electroacoustic transducers. Further, the computing device is configured to determine, based on the received electrical signals, the sound-producing characteristics of the electroacoustic transducers for use in controlling the electroacoustic transducers to generate one or more predetermined sounds.