View Technical Specification - Hotchkiss Air Supply

RAF Rectangular Attenuators - 7 SeriesRAF 740 Rectangular AttenuatorsThe RAF 740 range of attenuators offer high attenuation characteristics, with slightly lower acousticperformance but greater free area than the RAF 720 and RAF 730 ranges.Table A - RAF 740Attenuator Performance (Static Insertion Loss)AttenuatorOctave band mid frequenciesCode-L 63 125 250 500 1k 2k 4k 8kRA 740-06 5 8 14 18 22 18 16 13RA 740-09 7 10 17 24 28 22 19 15RA 740-12 8 13 20 29 33 27 21 17RA 740-15 10 15 24 34 39 31 23 18RA 740-18 11 17 28 44 48 36 25 19RA 740-21 12 19 30 47 50 41 28 21RA 740-24 13 22 33 50 50 45 31 23