Multi-source Audio Amplification with Independent Volume Control

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Solution Overview

Problem

Current audio amplification and ear protection devices cannot simultaneously amplify ambient sounds and secondary audio sources while allowing separate volume control for each, and they often fail to protect users from loud environments effectively.

Innovation Solution

A multi-source audio amplification and ear protection device with microphones to capture ambient sounds and a system to receive and amplify secondary sound sources via wireless or wired connections, featuring separate volume control for both and automatic gain control to limit loud sound exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a device amplifies ambient sounds from multiple sources, then the user can hear ambient sounds clearly, but the device complexity increases due to multiple microphones and electrical systems

Engineering Contradiction:

Improveambient sound detection accuracyVSAvoiddevice structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The device divides the audio processing function into separate channels: one for ambient sound signals and another for secondary sound source signals. Each channel has its own microphone(s) and electrical system, allowing independent processing and volume control while maintaining manageable system architecture through functional segmentation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The device integrates multiple functions into a single unit: it serves as both an audio amplification device for ambient sounds and an ear protection device with noise reduction capabilities. The same device can process multiple sound sources (ambient and secondary) simultaneously, providing versatile functionality that reduces the need for separate devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If the device provides separate volume control for ambient sound and secondary sound source, then the user can adjust each independently for optimal listening, but the device complexity increases due to additional control interfaces and electrical systems

Engineering Contradiction:

Improvevolume control flexibilityVSAvoidcontrol system

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The electrical system is divided into separate amplification channels for ambient sound and secondary sound source, each with its own volume control interface. This segmentation allows independent volume adjustment for each sound type while maintaining a modular control architecture that manages complexity through functional separation.

Inventive Principle:

Principle #1Segmentation

3Object-affected harmful factors

If the device uses automatic gain control to limit loud sound exposure, then ear protection is improved, but the amplification capability for normal sounds may be reduced

Engineering Contradiction:

Improveloud sound exposureVSAvoidamplification output

Core Design Contradiction:

Object-affected harmful factorsVSPower

Solution Approach 1:

The electrical system incorporates automatic gain control that dynamically adjusts the amplification level based on the input sound signal. For loud sounds exceeding safe exposure levels, the gain is reduced to protect the user's ears. For normal sound levels, the gain is maintained at optimal levels for clear audio reproduction, ensuring both ear protection and adequate amplification through dynamic adaptation.

Inventive Principle:

Principle #15Dynamics

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 users to hear both ambient and secondary audio sources at desired volumes, enhancing listening comfort and safety by protecting ears from loud noises through adjustable volume and automatic gain control.

Implementation Method 1

at least one microphone configured to generate an ambient sound signal based on detecting ambient sound

Methodology Applied

Scientific EffectMicrophone transduction:

Implementation Method 2

an electrical system configured to amplify the ambient sound signal and a secondary sound source signal

Methodology Applied

Scientific EffectElectrical amplification:

Implementation Method 3

control the at least one speaker to simultaneously output sound based on the ambient sound signal and sound based on the secondary sound source signal

Methodology Applied

Scientific EffectSpeaker transduction:

Data Source

PatentUS10757512B2Multi-source audio amplification and ear protection devices

Publication Date: 2020.08.25 TEAM IP HOLDINGS LLC

AI summary

Apparatus and methods for multi-source audio amplification and ear protection devices are provided herein. In certain configurations, an audio amplification and ear protection device includes at least one microphone that generates an ambient sound signal based on detecting ambient sound, at least one speaker, and an electrical system that controls sound outputted by the at least one speaker based on amplifying the ambient sound signal and a secondary sound source signal. The electrical system receives a first user-controlled volume signal that is operable to control an amount of amplification provided to the ambient sound signal, and a second user-controlled volume signal that is operable to control an amount of amplification provided to the secondary sound source signal.