Electronic Device Sound Leakage Prevention via Phase Inversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic devices allow received sounds to leak outside during voice calls, compromising user privacy, especially in public settings, and require additional units like earphones to prevent this leakage.
Innovation Solution
An electronic device with a receiver and a speaker that outputs phase-inverted sound to cancel out the leaked sound, using a controller to manage the output modes and reduce sound leakage without the need for separate units like earphones or Bluetooth headsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the received sound is output at high volume to ensure clear understanding during voice call, then the user can clearly understand the content of the voice call, but the received sound leaking out becomes louder and compromises user privacy
Solution Approach 1:
The patent converts the harmful leaked sound into a beneficial signal by capturing it through the microphone and generating a phase-inverted version. This inverted signal is then output through the speaker to cancel the original leaked sound through destructive interference, turning the harmful leakage into a mechanism for active noise cancellation and privacy protection.
Solution Approach 2:
The patent changes the phase parameter of the sound signal by inverting it (adding 180 degrees phase shift). This parameter change transforms the sound wave from constructive interference to destructive interference, allowing the system to cancel the leaked sound while maintaining the original sound quality for the user.
2Object-generated harmful factors
If the user uses an earphone to prevent sound leakage, then the received sound leakage can be prevented, but an additional unit is required and it is difficult for the user to hear sound from outside the electronic device during the voice call
Solution Approach 1:
The patent makes the existing speaker and microphone system multi-functional. The speaker not only outputs the received sound for the user but also generates the phase-inverted signal for noise cancellation. The microphone not only captures user voice but also captures the leaked sound for cancellation. This eliminates the need for separate earphones while maintaining privacy protection and external sound awareness.
Solution Approach 2:
The electronic device uses its own internal components (speaker and microphone) to solve the sound leakage problem without requiring external devices. The system captures its own leaked sound through the microphone and automatically generates the cancellation signal through the speaker, making the device self-sufficient and eliminating dependency on additional units like earphones.
3Device complexity
If the user performs voice call without additional units, then the device structure remains simple, but the received sound leaks outside compromising user privacy
Solution Approach 1:
The patent converts the harmful leaked sound into a beneficial signal by capturing it through the microphone and generating a phase-inverted version. This inverted signal is then output through the speaker to cancel the original leaked sound through destructive interference, turning the harmful leakage into a mechanism for active noise cancellation and privacy protection.
Solution Approach 2:
The patent implements a feedback mechanism where the microphone continuously monitors the leaked sound and feeds this information back to the controller. The controller then generates the corresponding phase-inverted signal and outputs it through the speaker to actively cancel the leakage in real-time, creating a closed-loop system that adapts to sound leakage conditions.
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
Effectively prevents sound leakage during voice calls, ensuring user privacy without the need for additional accessories, by using phase-inverted sound to cancel out the leaked sound through destructive interference.
Implementation Method 1
a speaker which outputs a phase-inverted received sound having an inverse phase with respect to a phase of the first received sound
Data Source
AI summary
An electronic device for preventing leakage of a received sound is provided. The electronic device includes a receiver which outputs the received sound; a receiving portion which receives the receiver; and a hole which communicates with the receiving portion.