Vehicle Virtual Engine Signal Layout for Balanced Front-Rear Sound Pressure
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Solution Overview
Problem
The existing virtual engine sound systems for vehicles face challenges in adjusting sound pressures of synthetic signals at the front and rear sides, leading to undesirable beep sounds when the vehicle travels rearward.
Innovation Solution
A virtual engine signal system for a vehicle that includes a first directional speaker at the front and a second omnidirectional speaker at the rear, controlled by a system that adjusts sound pressures by setting reference levels and transmitting specific control signals to ensure equal sound pressures at both sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the VESS is positioned at a front side of the vehicle, then the device complexity is reduced, but the sound pressure difference between front and rear sides causes undesirable beep sounds when traveling rearward
Solution Approach 1:
The patent divides the speaker system into two separate speakers: a first speaker positioned at the front back beam for front-side sound output, and a second speaker positioned at the rear for rear-side sound output. This segmentation allows independent control of sound pressure at different vehicle sides, eliminating the beep sound issue while maintaining simple device architecture.
Solution Approach 2:
The patent applies local quality by directing the first speaker toward the front side and the second speaker toward the rear side of the vehicle. Each speaker is optimized for its specific directional output, with the first speaker being directional and the second speaker being omnidirectional, thereby achieving appropriate sound pressure distribution without additional complex hardware.
2Object-generated harmful factors
If the VESS is additionally applied to the rear side of the vehicle to solve the beep sound problem, then the beep sound issue is resolved, but costs increase and space constraints occur
Solution Approach 1:
The second speaker serves multiple functions: it outputs virtual engine signals to the rear side, compensates for sound pressure differences, and eliminates beep sounds. This multi-functionality is achieved without adding separate hardware or controllers, as the existing speaker can be configured to perform all these roles through appropriate control signals.
Solution Approach 2:
The patent uses a simplified approach by positioning the second speaker to replicate the sound output function of the first speaker but at the rear location. Instead of adding complex additional hardware, the system copies the essential sound generation capability and adapts it for rear-side output, thereby reducing costs and space requirements.
3Object-generated harmful factors
If control signals are transmitted to adjust sound pressures of synthetic signals, then the sound pressure difference is solved, but the system complexity increases
Solution Approach 1:
The patent adjusts sound pressures by changing the parameters of control signals transmitted to the speakers. The controller modifies signal characteristics such as amplitude and timing to compensate for sound pressure differences at front and rear sides, achieving equalization through parameter adjustment rather than complex hardware modifications.
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
This solution effectively adjusts sound pressures of synthetic signals at both the front and rear sides of the vehicle, eliminating the need for additional hardware and reducing costs, while also addressing the issue of undesirable beep sounds.
Implementation Method 1
a first speaker provided on a front back beam of a vehicle, disposed to be directed toward a front side of the vehicle, and configured to output a virtual engine signal to the outside; a second speaker provided rearward of the first speaker, disposed to be directed toward a rear side of the vehicle, and configured to output a virtual engine signal to the outside
Implementation Method 2
the controller being configured to control the first and second speakers to adjust sound pressures of synthetic signals of the virtual engine signals of the first and second speakers at the front and rear sides of the vehicle
Data Source
AI summary
A virtual engine signal system for a vehicle includes a first speaker provided on a front back beam of a vehicle, disposed to be directed toward a front side of the vehicle, and configured to output a virtual engine signal to the outside, a second speaker provided rearward of the first speaker, disposed to be directed toward a rear side of the vehicle, and configured to output a virtual engine signal to the outside, and a controller configured to transmit control signals to the first and second speakers so that the first and second speakers output the virtual engine signals in response to the control signals, the controller being configured to control the first and second speakers to adjust sound pressures of synthetic signals of the virtual engine signals of the first and second speakers at the front and rear sides of the vehicle.