Acoustic Breathing Monitor for At-Home Lung Capacity Tracking

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Solution Overview

Problem

Traditional spirometry equipment for determining lung capacity is cumbersome and expensive, limiting its use to clinical settings, and patients often fail to comply with breathing exercises post-discharge, leading to respiratory complications.

Innovation Solution

A sound-producing breathing apparatus connected to a user's electronic device, such as a smartphone, records inhalation and exhalation sounds to determine lung capacity and peak expiratory flow using intensity or frequency analysis, with optional intervention if capacity falls below a threshold.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional spirometry equipment is used to determine lung capacity, then measurement precision is improved, but device complexity and cost increase, limiting use to clinical settings

Engineering Contradiction:

Improvelung capacity measurementVSAvoidspirometry equipment

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical spirometry equipment with an acoustic measurement system using a microphone to capture breath sounds. The system substitutes mechanical airflow measurement with acoustic signal processing, analyzing frequency and intensity characteristics of breath sounds to determine lung capacity and respiratory function.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent creates a simplified acoustic copy of the breath measurement process. Instead of directly measuring airflow with complex mechanical sensors, the system captures acoustic waves produced during breathing and processes these sound signals to infer lung capacity, peak expiratory flow, and other respiratory parameters.

Inventive Principle:

Principle #26Copying

2Measurement precision

If traditional spirometry equipment is used, then measurement accuracy is improved, but ease of operation deteriorates due to requirement for direct clinical oversight

Engineering Contradiction:

Improvelung capacity determinationVSAvoidbreathing exercise compliance

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent enables patients to perform respiratory function testing independently at home using a smartphone or portable device. The system provides automated guidance through the breathing exercise process and automatically analyzes the captured breath sounds, eliminating the need for clinical oversight while maintaining measurement accuracy.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates real-time feedback mechanisms that guide patients through breathing exercises and provide immediate results. The processor analyzes breath sound characteristics and provides feedback on lung capacity and respiratory function, enabling patients to self-monitor and maintain compliance with breathing exercises.

Inventive Principle:

Principle #23Feedback

3Reliability

If clinical monitoring is required for breathing exercises, then reliability of measurement is improved, but loss of time increases due to patient discharge limitations

Engineering Contradiction:

Improvepatient engagementVSAvoidpost-discharge monitoring continuity

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent transitions the measurement setting from a fixed clinical environment to a portable home-based system. By moving the monitoring capability to patients' homes through smartphone integration, the system eliminates the temporal and spatial constraints of clinical visits, enabling continuous post-discharge monitoring without requiring patient presence in clinical settings.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 convenient, cost-effective lung capacity monitoring outside clinical settings, promoting compliance and reducing respiratory complications by providing real-time feedback and intervention when necessary.

Implementation Method 1

a sound-producing breathing apparatus and a processor that is communicatively coupled to a microphone... receiving a recording of sound produced by the sound-producing breathing apparatus when a user inhales or exhales

Methodology Applied

Scientific EffectSound production through airflow: Aerophonics

Data Source

PatentUS20260020824A1Systems, devices, and methods for performing breathing exercises, improving lung function, performing pulmonary monitoring, and/or determining lung capacity and peak expiratory flow

Publication Date: 2026.01.22 AIROTONE INC

AI summary

Systems, devices, and methods for determining a user's lung capacity may employ a sound-producing breathing device and a recording device such as a microphone included in a user electronic device (e.g., smart phone or tablet computer). A user may inhale or exhale through the sound-producing breathing device, thereby producing a sound that is received by the microphone and communicated to a processor. The processor may analyze the received sound recording to determine one or more sound intensity values over, for example, the duration of the received sound and/or points in time within the sound recording. The sound intensity values may then be used to determine the user's lung capacity.