Loudspeaker Array Obstacle Compensation via Signal Adjustment

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Solution Overview

Problem

The sound-making effect of loudspeakers is negatively influenced by obstacles, such as user interactions on touchscreen displays, leading to undesirable auditory experiences.

Innovation Solution

An interaction apparatus comprising a loudspeaker array with an obstacle detection module and a compensation module that adjusts the input signal to counteract the influence of obstacles, ensuring optimal sound production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a transparent film loudspeaker is applied on a touchscreen surface to generate touch feedback, then the loudspeaker can provide tactile interaction capability, but user touch operations on the screen surface negatively influence the sound-making capability of the loudspeaker

Engineering Contradiction:

Improvetouch feedback capabilityVSAvoidsound-making capability

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system uses sensors to detect obstacles (such as user fingers) near the loudspeaker surface, and based on this feedback information, dynamically adjusts the driving signals of the loudspeaker units to compensate for the acoustic shadow effect caused by the obstacles, thereby maintaining sound quality while enabling touch interaction

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the parameters of the driving signals (such as amplitude, phase, or frequency) of the loudspeaker units based on the detected obstacle parameters, adjusting the acoustic output to compensate for the blocking effect and maintain optimal sound-making capability

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If an obstacle blocks the sound-making surface of the loudspeaker, then the loudspeaker structure remains simple and easy to manufacture, but the sound-making effect is negatively influenced

Engineering Contradiction:

Improveloudspeaker structureVSAvoidsound-making effect

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The loudspeaker is divided into multiple independent loudspeaker units arranged in an array, allowing individual units to be adjusted based on obstacle detection, thereby maintaining simple overall structure while enabling sophisticated acoustic compensation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system incorporates obstacle detection and signal adjustment mechanisms that work with the segmented loudspeaker units to compensate for blocking effects, maintaining simple structure while improving sound-making effect under obstacle conditions

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10142752B2Interaction with devices

Publication Date: 2018.11.27 BEIJING ZHIGU RUI TUO TECH

AI summary

An interaction apparatus comprises: a loudspeaker array, comprising speaker units, where each speaker unit is configured to make sound according to an input signal; an obstacle detection module, configured to detect an obstacle parameter corresponding to an obstacle inside space on a side of a sound-making surface of the loudspeaker array; and a compensation module, configured to adjust, according to the obstacle parameter, the input signal corresponding to a speaker unit of the speaker units, and compensate for a sound-making effect of the loudspeaker array influenced by the obstacle. A loudspeaker array comprising the speaker units can be disposed, an obstacle that influences a sound-making effect of the loudspeaker array can be detected, and an input signal of a corresponding speaker unit can be adjusted when the obstacle exists, thereby alleviating influence from the obstacle on the sound-making effect during use, and improving user experience.