US Patent 7137477 Sound absorbers

Overview Structured Data Issues Contributors Activity

All edits

Edits on 6 Sep, 2023

"Add patent inventor(s)"

Golden AI

edited on 6 Sep, 2023

Edits made to:

Infobox (+6 properties)

Infobox

Patent Inventor Names

Colm Doris0

Hans-Peter Keller0

Marco Schneider0

Norbert Nicolai0

Olaf Dohring0

Rod Morris-Kirby0

Edits on 31 Aug, 2023

"Add patent abstract"

Golden AI

edited on 31 Aug, 2023

Edits made to:

Article (+693 characters)

Article

Patent abstract

The present invention relates to a sound absorber consisting of a first non-woven fabric facing towards the sound-emitting source having a layer thickness within a range of from 2 to 15 mm, a density within a range of from 50 to 500 kg/m3, a weight per surface area within a range of from 0.1 to 2.5 kg/m2, and a flow resistance within a range of from 50 to 1000 kNs/m4, and a second non-woven fabric facing away from the sound-emitting source has a layer thickness within a range of from 10 to 28 mm, a density within a range of from 20 to 100 kg/m3, a weight per surface area within a range of from 0.4 to 1 kg/m2, and a flow resistance within a range of from 10 to 40 kNs/m4.

Edits on 22 May, 2023

"Remove website redirecting to Patent Public Search front page"

Golden AI

edited on 22 May, 2023

Edits made to:

Infobox (-1 properties)

Infobox

Official Website

https://pdfpiw.uspto.gov/.piw?Docid=071374770

Edits on 18 May, 2023

"Remove leading 0 from patent number"

Golden AI