# Humming whirling noise on acceleration

**URL:** <https://community.cartalk.com/t/humming-whirling-noise-on-acceleration/7976>\
**Category:** Maintenance/Repairs\
**Created:** [December 4, 2007, 4:29pm UTC](https://community.cartalk.com/t/humming-whirling-noise-on-acceleration/7976 "2007-12-04T16:29:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Yogiraj](https://avatars.discourse-cdn.com/v4/letter/y/838e76/32.png) [@Yogiraj](https://community.cartalk.com/u/Yogiraj)\
**Post date:** [December 4, 2007, 4:29pm UTC](https://community.cartalk.com/t/humming-whirling-noise-on-acceleration/7976/1 "2007-12-04T16:29:00Z")

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I have a 2001 Bonneville. I get a humming whirling noise on acceleration. The pitch gets higher and lower on acceleration and decelleration, respectively. Could this be the alternator? I had front wheel bearings replaced this past year.

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [December 4, 2007, 6:18pm UTC](https://community.cartalk.com/t/humming-whirling-noise-on-acceleration/7976/2 "2007-12-04T18:18:00Z")

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Sometimes, one has to hear a sound to make a determination as to its cause.