Alarm Sounder Volume Control Using Environmental Feedback

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Solution Overview

Problem

Existing sounders in alarm systems require manual volume adjustment by installers, leading to errors and inefficiencies, as they do not dynamically adapt to changing environmental conditions, thus consuming unnecessary energy and potentially failing to meet safety standards.

Innovation Solution

A fire alarm system with integrated sounders, detectors, and a microcontroller that automatically adjusts volume based on environmental parameters, using detectors for occupancy, ambient noise, and space dimensions, allowing for dynamic volume control and reducing energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If manual volume adjustment is used during installation, then the sounder volume can be set, but human error and estimation lead to incorrect volume selection and inability to adapt to environmental changes

Engineering Contradiction:

Improvevolume adaptabilityVSAvoidvolume selection accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The sounder system performs self-adjustment of volume by automatically detecting environmental parameters (ambient noise levels, occupancy) and adjusting its own volume output accordingly, eliminating the need for manual installer configuration and enabling continuous adaptation to changing conditions

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors environmental conditions through detectors and uses this feedback to dynamically adjust the sounder volume, creating a closed-loop control system that maintains optimal volume levels based on real-time environmental data

Inventive Principle:

Principle #23Feedback

2Reliability

If high volume is maintained to ensure safety standards are met, then alarm effectiveness is ensured, but energy consumption increases unnecessarily

Engineering Contradiction:

Improvealarm effectivenessVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The sounder volume transitions from a static fixed setting to a dynamic adjustable parameter that changes in real-time based on environmental conditions, allowing the system to use high volume only when necessary for safety while reducing volume during low-ambient-noise periods to conserve energy

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the volume parameter dynamically based on detected environmental parameters, adjusting the sounder output level to match actual environmental conditions rather than maintaining a constant high volume setting

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If installer estimation is used for volume selection, then installation process is simple, but errors are introduced and the most appropriate volume cannot be determined

Engineering Contradiction:

Improveinstallation simplicityVSAvoidvolume measurement accuracy

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The manual estimation process is replaced with automatic electronic detection and control, where detectors measure ambient noise levels and occupancy objectively, eliminating subjective installer judgment and providing precise, data-driven volume selection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP4009298B1Sounder dynamic volume adjustment

Publication Date: 2026.03.18 CARRIER CORP

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AI summary

A sounder apparatus 100 comprising, a sounder 110 having at least two volume settings, at least one detector 120, a micro-controller wherein the micro controller is configured to receive an input signal from the at least one detector 120, and to control the volume setting of the sounder based on the input signal.