Spin-Air Speaker Acoustic Fire Suppression
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Solution Overview
Problem
Conventional speaker technologies are limited in producing precise modulation of sound, particularly in lower audio bands and below, and are ineffective in specialized applications like fire suppression, where traditional sirens are inadequate for rapid frequency changes and fire extinguishing.
Innovation Solution
The Spin-Air Speaker employs a disc with a pattern of openings spun at precisely modulated speeds, coupled with a controlled airflow mechanism, utilizing stepper motors or motor/encoder combinations for fine sound production control, capable of generating a wide range of sound patterns, including frequencies below human hearing range, suitable for fire suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional speaker technology using cones or diaphragms is used, then sound generation is effective for general applications, but precise modulation of sound in lower audio bands and below is limited
Solution Approach 1:
The patent replaces the traditional mechanical cone/diaphragm system with an air-driven rotating disc system featuring patterned openings. This substitution enables precise control of sound wave generation through rotational speed modulation and opening patterns, achieving accurate sound modulation in lower frequency bands while expanding frequency range versatility.
2Adaptability or versatility
If conventional sirens are used, then two-tone sounds can be generated, but rapid frequency changes and fire extinguishing capabilities are insufficient
Solution Approach 1:
The patent implements dynamic control of the rotating disc's rotational speed, allowing rapid changes in rotation rate to achieve quick frequency transitions. The system can dynamically adjust between different operational modes including fire extinguishing frequencies, enabling both adaptability and high productivity in frequency changes.
3Ease of manufacture
If disc shape is used for simplicity, then manufacturing is easier, but pump vanes cause significant drag requiring more time to reach desired frequency
Solution Approach 1:
The patent applies local quality optimization by strategically positioning and patterning openings in the disc rather than using uniform vanes. This localized opening pattern reduces drag while maintaining the simple disc shape, allowing the system to reach desired frequencies more quickly without sacrificing manufacturing ease.
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 technology enables precise sound modulation and frequency control, effectively extinguishing fires by disrupting the air around the flames, cutting off oxygen supply or disturbing combustion, demonstrating improved performance over traditional sirens in fire suppression scenarios.
Implementation Method 1
a disc with a pattern of openings, spun at precisely modulated speeds and coupled with a controlled airflow mechanism, to produce a wide range of sound patterns
Implementation Method 2
precision motor control, utilizing technologies such as stepper motors or motor/encoder combinations, enables the fine modulation of the rotation of the disc
Implementation Method 3
using sound waves, particularly at low frequencies, to extinguish fires. The underlying principle involves using these sound waves to disrupt the air around a fire, cutting off the oxygen supply or disturbing the combustion process
Data Source
AI summary
The spin-air speaker is an innovative sound generation and manipulation device, primarily characterized by a modulated spinning disc with a tailored hole pattern and a mechanism for controlled airflow. This technology leverages a precision motor assembly, which includes options such as a stepper motor or a motor/encoder combination, to modulate the disc's rotation speed and pattern. The invention's uniqueness lies in its ability to produce a wide range of sound frequencies and patterns, adjustable through the disc's hole pattern. A notable application of the spin-air speaker is in the field of fire suppression, where it utilizes specific sound frequencies to target and extinguish fires by achieving what is termed a “Pyrosonic lock” on the fire's fundamental and harmonic frequencies. The spin-air speaker's versatility extends to generating musical notes and melodies, and its capability to produce sounds below the human hearing range opens up possibilities for various non-entertainment applications, including but not limited to fire extinguishment.