Vehicle Speaker Arrangement for Conversation Privacy
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Solution Overview
Problem
In vehicles, particularly motorcycles, there is a need to prevent conversation content from being overheard by third parties due to the increased possibility of voice transmission during hands-free calling, which existing technologies have not adequately addressed.
Innovation Solution
The implementation of a vehicle with multiple voice output sections arranged side by side in the width direction, where at low speeds, specific voice output sections output noise sound or voice signals to prevent eavesdropping, and as speed increases, the sound volume is adjusted to prioritize voice transmission to occupants while minimizing external hearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If voice output sections output voice signals to occupants, then occupants can hear conversations, but third parties can also eavesdrop on the conversations
Solution Approach 1:
The patent applies dynamics by making the noise sound output dynamic rather than static. The control section adjusts the noise sound output based on vehicle speed - outputting noise sound when the vehicle is stationary or moving at low speed to prevent eavesdropping, and stopping or reducing noise sound when the vehicle moves at high speed where wind noise already masks conversations. This dynamic adjustment resolves the contradiction between maintaining conversation privacy and ensuring voice communication functionality.
Solution Approach 2:
The patent changes the parameter of noise sound output level based on vehicle speed conditions. By monitoring vehicle speed and adjusting the noise sound parameter accordingly (outputting at low speeds, stopping at high speeds), the system adapts to different operational contexts, preventing eavesdropping when needed while maintaining natural voice communication when vehicle noise already provides masking.
2Loss of information
If noise sound is output from voice output sections, then third-party eavesdropping is suppressed, but voice transmission to occupants is blocked
Solution Approach 1:
The system dynamically switches between noise sound output and voice signal output based on vehicle speed. At low speeds, noise sound is output to prevent eavesdropping while voice communication is maintained through the same speakers. At high speeds, voice signals are output directly without noise sound since wind noise naturally masks conversations. This dynamic switching resolves the contradiction by ensuring voice communication reliability is maintained across different operating conditions.
Solution Approach 2:
The system periodically adjusts its operation based on changing vehicle speed conditions. The control section continuously monitors speed and switches between noise sound output and voice signal output modes, creating a periodic adaptation pattern that maintains both conversation privacy and communication reliability as operating conditions change.
3Area of stationary object
If multiple voice output sections are used, then voice coverage is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by making the voice output sections serve dual purposes: they output both noise sound and voice signals through the same speakers. The speakers are not dedicated solely to voice output but function as multi-purpose audio output devices that can generate masking noise or reproduce voice signals based on control instructions, thereby reducing the need for separate dedicated noise generation devices.
Solution Approach 2:
The system merges the noise sound generation function and voice signal output function into a single integrated system using the existing voice output sections. By combining these functions in the speakers and controlling them through a unified control section, the patent avoids the complexity of separate noise generation devices while maintaining wide voice coverage and conversation privacy protection.
Data Source
AI summary
A vehicle includes a first voice output section, a second voice output section, and a third voice output section which are arranged side by side in a vehicle width direction of the vehicle. If the vehicle speed is a first threshold or less, the vehicle causes at least one of the first voice output section, second voice output section, and third voice output section to output noise sound.