i gcás inarb ionann αn,5534 agus an chomhéifeacht um ionsú fuaime atmaisféaraí don bhanda minicíochta n (arna áireamh de réir dB/m) arna ríomh ag úsáid SAE ARP-5534 le teocht T, agus bogthaise choibhneasta RH.
where αn,5534 is the coefficient of atmospheric absorption for the frequency band n (expressed in dB/m) calculated using SAE ARP-5534 with temperature T, and relative humidity RH.
“Is féidir glacadh leis go bhfuil na comhéifeachtaí laghdaithe torainn i dTábla D-1 bailí thar raon réasúnta teochta agus bogthaise. Le seiceáil an gá coigeartuithe a dhéanamh áfach, ba cheart SAE ARP-5534 a úsáid chun na meán-chomhéifeachtaí um ionsú fuaime atmaisféaraí a ríomh i ndáil leis an meánteocht aerfoirt T agus bogthaise choibhneasta RH. I gcás ina meastar, tar éis iad sin a chur i gcomparáid leis na comhéifeachtaí i dTábla D-1, go bhfuil gá le coigeartú ba cheart an mhodheolaíocht seo a leanas a úsáid.”
‘The attenuation coefficients in Table D-1 may be assumed valid over reasonable ranges of temperature and humidity. However, to check whether adjustments may be necessary, SAE ARP-5534 should be used to calculate average atmospheric absorption coefficients for the average airport temperature T and relative humidity RH. Where, from a comparison of these with those in Table D-1, it is judged that adjustment is required the following methodology should be used.’;