Gaois

Search direction

Search mode

Filter results

Collections

2 results in 1 document

  1. #2001086

    “Chun an maolú cliathánach a ríomh agus cothromóid (2.7.40) á húsáid (i gcás ina dtomhaistear β i bplána ceartingearach), moltar ruthag eitilte cothrom sínte a úsáid. Sainítear ruthag eitilte cothrom sínte sa phlána ceartingearach trí S1S2 leis an gclaonfhad ingearach céanna dp ón mbreathnadóir.

    ‘To calculate the lateral attenuation using equation (2.7.40) (where β is measured in a vertical plane), an extended level flight path is recommended. An extended level flight path is defined in the vertical plane through S1S2 and with the same perpendicular slant distance dp from the observer. This is visualised by rotating the triangle ORS, and its attached flight path about OR (see Figure 2.7p) through angle γ thus forming the triangle ORS’.

    Commission Delegated Directive (EU) 2021/1226 of 21 December 2020 amending, for the purposes of adapting to scientific and technical progress, Annex II to Directive 2002/49/EC of the European Parliament and of the Council as regards common noise assessment methods (Text with EEA relevance)

  2. #2001105

    Tá pointe ascnaimh is gaire an ruthaig chothroim choibhéisigh don bhreathnadóir O ag S’, claonfhad d, ionas go sainítear an uilleann airde leis an triantán OCS’ arna chruthú sa phlána ceartingearach β = cos-1(ℓ/d).

    The closest point of approach of the equivalent level path to the observer O is at S’, slant distance d, so that the triangle OCS’ so formed in the vertical plane then defines the elevation angle β = cos-1(ℓ/d).

    Commission Delegated Directive (EU) 2021/1226 of 21 December 2020 amending, for the purposes of adapting to scientific and technical progress, Annex II to Directive 2002/49/EC of the European Parliament and of the Council as regards common noise assessment methods (Text with EEA relevance)