Hi Maik, Maik Justus wrote: > the effect you are discussing is not the Doppler effect, but just the > Yes, I know it's not a function of the Doppler itself, but I was thinking more along the lines of the volume drop off, if it were better, might help the convincingness of the Doppler, if you see what I mean.
> volume as a function of the distance. Every aircraft has its own sound > definition including the distance, where the volume is halved > (<reference-dist>) and the distance where the volume is cutted off > (<max-dist>). Hmm, interesting. It seems that a great many aircraft do not define these values at all. Is there a default definition for these somewhere, is one calculated by openal maybe in the absence of these specific settings? At the end of this message is a quick grep showing the aircraft which do not define reference-dist. Quite a list. Just to clarify on the reference-dist, is it that this value is a diminishing effect, that is for reference-dist of 1 after distance 1 the volume is half original, after distance 2 the volume is 1/4 original (half of a half), distance 3 it's an 1/8th (half of a quarter). Or is it simply that at that specific distance, and for infinity beyond until max-dist the volume is always half the original? Here is the list, checking for max-dist yields basically the same result. for file in *; do fgrep -r reference-dist $file >/dev/null; if [ "$?" != "0" ]; then echo "$file - no reference-dist"; fi; done 14bis - no reference-dist 707 - no reference-dist 737 - no reference-dist 737-300 - no reference-dist 747 - no reference-dist 747-200 - no reference-dist 787 - no reference-dist a10 - no reference-dist A-10 - no reference-dist A300 - no reference-dist A320 - no reference-dist A320-family - no reference-dist A380 - no reference-dist a4 - no reference-dist A-6E - no reference-dist A6M2 - no reference-dist airwaveXtreme150 - no reference-dist Albatross - no reference-dist Alphajet - no reference-dist an225 - no reference-dist AN-225 - no reference-dist AR-234 - no reference-dist as350 - no reference-dist ASK21 - no reference-dist asw20 - no reference-dist ATC - no reference-dist B-17 - no reference-dist B-1B - no reference-dist B-2 - no reference-dist b29 - no reference-dist b52 - no reference-dist B-52F - no reference-dist BAC-TSR2 - no reference-dist beaufighter - no reference-dist bell206 - no reference-dist Bernard-HV220 - no reference-dist bf109 - no reference-dist bleriot-XI - no reference-dist bocian - no reference-dist Buccaneer - no reference-dist Bugatti - no reference-dist c172x - no reference-dist c182 - no reference-dist c182rg - no reference-dist C-2A - no reference-dist c310u3a - no reference-dist C550B - no reference-dist C684 - no reference-dist CanberraBI8 - no reference-dist Caravelle - no reference-dist Carreidas - no reference-dist Citation - no reference-dist colditz - no reference-dist couzinet70 - no reference-dist dc3 - no reference-dist DerKleineUhu - no reference-dist DH-88 - no reference-dist DH-89 - no reference-dist DO-335 - no reference-dist DO-X - no reference-dist Dragonfly - no reference-dist E3B - no reference-dist ec130 - no reference-dist eurofighter - no reference-dist f104 - no reference-dist F-106-dart - no reference-dist f-14b - no reference-dist f15 - no reference-dist f15c - no reference-dist f16 - no reference-dist f18 - no reference-dist F4U - no reference-dist F80C - no reference-dist F-86 - no reference-dist F-8E - no reference-dist F-8E-Crusader - no reference-dist Farman-IV - no reference-dist fkdr1 - no reference-dist fokker100 - no reference-dist fokker50 - no reference-dist fw190 - no reference-dist harrier - no reference-dist He162 - no reference-dist HondaJet - no reference-dist Hornet - no reference-dist Hunter - no reference-dist Instruments - no reference-dist Instruments-3d - no reference-dist j22 - no reference-dist j3cub - no reference-dist j7w - no reference-dist jeep - no reference-dist ju52 - no reference-dist KC135 - no reference-dist Ki-84 - no reference-dist Lightning - no reference-dist Lockheed-SR71 - no reference-dist Macchi-Castoldi-MC72 - no reference-dist Malolo1 - no reference-dist marchetti - no reference-dist MD11 - no reference-dist MIBS - no reference-dist MiG-15 - no reference-dist Mig-29 - no reference-dist mirage2000 - no reference-dist MPCarrier - no reference-dist NTPS - no reference-dist ogel - no reference-dist OH-1 - no reference-dist ornithopter - no reference-dist OV10_USAFE - no reference-dist P-38-Lightning - no reference-dist p51d - no reference-dist paraglider - no reference-dist payen-pa100 - no reference-dist PC-6 - no reference-dist pc7 - no reference-dist pushback - no reference-dist Rascal - no reference-dist SaabJ35Draken - no reference-dist santa - no reference-dist seahawk - no reference-dist SeaVixen - no reference-dist sgs126 - no reference-dist sgs233 - no reference-dist shuttle - no reference-dist Skyvan - no reference-dist snowplow - no reference-dist sopwithCamel - no reference-dist spitfireIX - no reference-dist sr20 - no reference-dist SR71-BlackBird - no reference-dist Starship - no reference-dist Stieglitz - no reference-dist Stiletto - no reference-dist Storch - no reference-dist SU-37 - no reference-dist Submarine_Scout - no reference-dist Supermarine-S.6B - no reference-dist Superwal - no reference-dist T37 - no reference-dist T38 - no reference-dist T-4 - no reference-dist t6texan2 - no reference-dist tsr2 - no reference-dist TU-114 - no reference-dist tu154 - no reference-dist ufo - no reference-dist UIUC - no reference-dist Vickers-Vimy - no reference-dist vulcanb2 - no reference-dist wrightFlyer1903 - no reference-dist X15 - no reference-dist x24b - no reference-dist YardStik - no reference-dist yf23 - no reference-dist YF-23 - no reference-dist ZF_Navy_free_balloon - no reference-dist ZivkoEdge - no reference-dist ZLT-NT - no reference-dist --- James Sleeman ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
