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Active sound desensitization to tonal noise in a vehicle

A sound, vehicle technology, applied in active noise control, vehicle components, sensors, etc., can solve problems such as distraction, prominent tonal noise, annoying, etc.

Pending Publication Date: 2018-11-13
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although tonal noise is relatively quiet compared to broadband noise, people are good at selectively hearing tonal noise when immersed in broadband noise
Because tonal noise is prominent, tonal noise tends to be more annoying and / or distracting than broadband noise

Method used

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  • Active sound desensitization to tonal noise in a vehicle
  • Active sound desensitization to tonal noise in a vehicle
  • Active sound desensitization to tonal noise in a vehicle

Examples

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Embodiment Construction

[0017] While the invention may be embodied in various ways, some exemplary and non-limiting embodiments are shown in the drawings and are described below, it should be understood that this disclosure is to be considered illustrative of the invention and is not intended to The invention is limited to the specific embodiments described.

[0018] Electric motors such as those used in electric, hybrid, and fuel cell vehicles produce tonal noise. Tonal noise is noise with a narrow frequency band. This tonal noise is produced by electromagnetic forces in the electric motor that drives the crankshaft. Traditionally, electric motor designs have been optimized for noise, vibration, and harshness in order to reduce tonal noise in the vehicle cabin, which can affect weight, cost, and / or fuel economy, among others.

[0019] As described below, the vehicle's sound system actively desensitizes tonal noise to increase comfort and reduce vehicle occupant distraction. The sound system produ...

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PUM

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Abstract

Method and apparatus are disclosed for active sound desensitization to tonal noise in a vehicle. An example vehicle includes an electric motor, a microphone, speakers, and an active sound desensitizer. The active sound desensitizer (a) randomizes channels of the speakers based on multiple uncorrelated broadband sound profiles, (b) determine upper and lower frequency band limits for a band-limitedfilter, (c) generate a desensitizing sound based on the upper and lower frequency band limits and the randomized channels, and (d) broadcast the desensitizing sound via the speakers.

Description

technical field [0001] The present invention relates generally to vehicles having electric motors and, more particularly, to active sound desensitization of tonal noise in vehicles. Background technique [0002] Electric (ie, hybrid / electric) vehicles and fuel cell vehicles exhibit different noise characteristics than conventional internal combustion engine powered vehicles. Due to the absence of background engine noise associated with, for example, acceleration, deceleration, and braking conditions, the tonal noise (sometimes referred to as "noise") caused by the electric motor / generator in these vehicles can interfere with the occupants of the vehicle. Tonal noise has a pitch within a narrow frequency band. Although tonal noise is relatively quiet compared to broadband noise, people are good at selectively hearing tonal noise when immersed in broadband noise. Because tonal noise is prominent, tonal noise tends to be more annoying and / or distracting than broadband noise....

Claims

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Application Information

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IPC IPC(8): G10K11/16G10L21/0208B60R16/037
CPCB60R16/0373G10K11/16G10L21/0208G10K11/175B60L1/00H04R2499/13B60L2270/00H04R3/04H04S7/30G10K2210/1282H04R3/12G10K11/178H04R2410/05H04R3/00G10K2210/3028G10K2210/3044
Inventor 那立群李明仁郑明德李明锋罗摩松德尔·克利须那斯瓦米
Owner FORD GLOBAL TECH LLC
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