Vehicle Sound Wave Synthesis for Speed-Based Engine Feedback
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Solution Overview
Problem
New energy vehicles lack perceptible engine sound feedback during driving, affecting driving safety and in-vehicle sound quality.
Innovation Solution
A synthesis method for vehicle sound waves involving frequency division and conversion processing of audio samples, determining sample proportions and loudness based on driving speed, and generating synthesized sound wave instructions to control in-vehicle loudspeakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If new energy vehicles are used to replace orthodox fuel vehicles, then environmental friendliness and energy efficiency are improved, but engine sound feedback is lost affecting driving safety and sound quality
Solution Approach 1:
The patent introduces a sound synthesis system as an intermediary that generates artificial engine sound feedback based on motor power output and driving conditions. This mediator restores the missing acoustic feedback loop without requiring a physical engine, thereby maintaining driving safety while preserving the benefits of electric propulsion.
Solution Approach 2:
The patent replaces the mechanical engine sound generation system with an electronic sound synthesis system. Instead of relying on the physical engine to produce sound, the system uses processors and loudspeakers to generate artificial engine sounds that mimic real engine acoustic characteristics, thus maintaining safety feedback while eliminating the mechanical engine.
2Loss of energy
If new energy vehicles are used to replace orthodox fuel vehicles, then energy efficiency is improved, but in-vehicle sound quality requirement is not met
Solution Approach 1:
The patent dynamically adjusts multiple sound parameters including frequency, amplitude, timbre, and spatial distribution based on real-time motor power output and driving conditions. By continuously modifying these acoustic parameters, the system reproduces the varying sound characteristics of real engines across different operating states, thereby achieving high sound quality while maintaining energy efficiency.
Solution Approach 2:
The patent combines multiple sound sources and processing techniques to create a composite artificial engine sound. By synthesizing multiple frequency components and merging them with spatial audio effects, the system achieves rich and realistic sound quality that satisfies driver expectations while operating an efficient electric motor.
3Ease of manufacture
If frequency division processing is performed on sound wave audio samples, then sound quality and realism are improved, but processing time and computational complexity increase
Solution Approach 1:
The patent divides the sound wave audio signal into multiple frequency bands using spectral analysis. By segmenting the audio into distinct frequency components, the system can independently process and synthesize each band, which improves sound quality through precise frequency control while enabling parallel processing to reduce overall computation time.
Solution Approach 2:
The patent pre-calculates and stores frequency response characteristics, transfer functions, and sound synthesis parameters in lookup tables or databases. During real-time operation, the system queries these pre-computed data based on current driving conditions, avoiding time-consuming real-time calculations and significantly reducing processing delay while maintaining high sound quality.
Data Source
AI summary
A synthesis method of a vehicle sound wave, a synthetic device thereof, an electronic device, and a computer-readable storage medium relate are provided. The synthesis method includes acquiring a first sound wave audio sample corresponding to a current driving speed of a vehicle for frequency division processing and frequency conversion processing to obtain processed audio samples in different frequency bands; determining sample proportion information of different frequency bands and overall loudness information according to the current driving speed of the vehicle, generating a to-be-output sound wave audio based on the processed audio samples in different frequency bands, the sample proportion information, and the overall loudness information; and generating at least one synthesized sound wave output instruction sending to at least one in-vehicle loudspeaker based on the to-be-output sound wave audio. The synthesis method enhances a driver's perception on real-time vehicle power, improves driving safety, and improves in-vehicle sound quality.