09765796 cites 10 patents.

Devices and methods for reducing noise of a blower reduce and/or substantially block the exchange of gas within the blower housing from an area of a generally high-velocity flow of gas to an area of a comparatively lower-velocity flow of gas, for example near the outlet of the blower housing.

Title
Devices and methods for reducing noise in a blower housing
Application Number
14/357369
Publication Number
9765796 (B2)
Application Date
November 13, 2012
Publication Date
September 19, 2017
Inventor
Russell Hughes Norris
Murrysville
PA, US
Assignee
Koninklijke Philips
NL
IPC
F04D 29/44
F04D 29/42
F04D 29/66
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