Suspended Internal Microphone Mounting for Acoustic Isolation
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Solution Overview
Problem
Conventional sound capture systems for musical instruments, particularly percussion instruments with stretched membranes, face challenges in achieving optimal acoustic isolation and minimizing unwanted noise pickup due to rigid mounting and placement issues, leading to suboptimal sound quality and interference from adjacent instruments.
Innovation Solution
A sound capture system with a suspension system that acoustically decouples a sound capture device from the musical instrument, using a diffusor and radio-frequency shielding, and incorporating multiple transducers aligned at an angle to the membrane, along with a signal processing circuit for noise cancellation and frequency adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transducer is placed inside the musical instrument, then the sound capture is improved, but the transducer contacts the interior surface causing noise and interference
Solution Approach 1:
The patent introduces a suspension system with elastic elements as an intermediary between the transducer and the instrument interior. This mediator allows the transducer to be positioned inside the instrument for optimal sound capture while preventing direct contact with the interior surface, thus eliminating contact noise and interference.
Solution Approach 2:
The patent extracts the harmful contact function by completely isolating the transducer from the instrument interior surface. The suspension system allows the transducer to be suspended in space within the instrument chamber without touching any surfaces, removing the source of contact-induced noise and interference.
2Stability of the object's composition
If a fixed or rigid mounting stand is used to hold the transducer, then the transducer is securely positioned, but acoustic coupling with the instrument causes unwanted vibrations and noise
Solution Approach 1:
The patent replaces rigid mounting structures with flexible elastic elements that form a compliant suspension system. These flexible elements provide the necessary mechanical support and positioning stability while acoustically isolating the transducer from the instrument, preventing vibration transmission and noise generation.
Solution Approach 2:
The patent substitutes the rigid mechanical mounting system with an elastic suspension system. This replacement maintains the transducer's stable positioning while changing the mechanical coupling characteristics from rigid (noise-generating) to compliant (acoustically isolated), eliminating the harmful vibrations.
3Ease of manufacture
If the sound capture device contacts the interior surface, then mounting is simplified, but acoustic interference and noise pickup increase
Solution Approach 1:
The elastic suspension elements serve as intermediaries that simplify mounting by providing self-aligning, compliant connections between the transducer and the instrument structure. These intermediaries eliminate the need for complex rigid mounting arrangements while preventing acoustic interference through their inherent flexibility.
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 system provides improved acoustic isolation, reduced noise interference, and enhanced sound quality by minimizing contact with the instrument's interior and effectively canceling unwanted resonances, allowing for consistent and accurate capture of sound vibrations without obstructing the player's performance.
Implementation Method 1
The suspension system is capable of acoustically decoupling the sound capture device from the sound-generating device
Implementation Method 2
The sound capture device can include a plurality of transducers configured to generate a plurality of audio signals concurrently from sound generated by the sound-generating device
Implementation Method 3
The sound capture device is encompassed by radio frequency shielding
Implementation Method 4
the system can include a diffusor positioned below the sound capture device within the sound-generating device
Data Source
AI summary
A sound capture system can include a sound capture device configured for placement within a sound-generating device. The sound capture system can include a suspension system configured to suspend the sound capture device within the sound-generating device. The suspension system acoustically decouples the sound capture device from the sound-generating device. The sound capture device includes a plurality of transducers configured to generate a plurality of audio signals concurrently from sound generated by the sound-generating device. In another aspect, the sound capture system includes a signal processing circuit.