1 / 40

Rise Above the Jet Noise

Rise Above the Jet Noise. AVX Adaptive Encoding Jeremy Hoenack,CAS, MPSE Sound Trax Studios jhoenack@avxsound.com. AVX Inflight Sound Overview 1. Subtle dialog is clear and easy to understand Underscore and background effects that are normally lost are crisp and clear

mahina
Download Presentation

Rise Above the Jet Noise

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Rise Above the Jet Noise AVX Adaptive Encoding Jeremy Hoenack,CAS, MPSE Sound Trax Studios jhoenack@avxsound.com

  2. AVX Inflight SoundOverview 1 • Subtle dialog is clear and easy to understand • Underscore and background effects that are normally lost are crisp and clear • Film sound-track masks jet noise instead of reverse • No high sound levels, no ear pain, no need to constantly adjust volume, natural sounding • More immersion in film – more positive flight experience • No new equipment – compatible with all IFE systems

  3. AVX Inflight SoundOverview 2 • Psycho-acoustic adaptive encoding • Parses, disassembles, restructures the dynamic range in real time – constantly adapts to program content • Enables full optimization of dynamic range to needs of human hearing without severe limitations of existing technology

  4. AVX Inflight SoundOverview 3 • Adaptive Encoder vs. Compressor/Limiter • DSP intensive vs. analog design • Unlimited design possibilities vs. practical limitations • AVX “reverse-compression” emulates how brain deals with high ambient noise like conversation on a jet

  5. IFE sound system – The Titanic • Destined to cruise over sea of noise – 75db SPL (From take-off to landing, like sitting next to a vacuum cleaner, a hair dryer, or standing in the shower.) • Can not change course very quickly – prohibitive costs • Needs to accommodate all kinds of people and stuff – variety of headphones, hardware, media

  6. Film sound track – The Iceberg A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA AAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA • Only the peaks are noticed • Most of it obscured by sea of noise • “Big picture” missing – no context • Tells how to perceive visual (picture) • Controls emotional response eg. fear • Conveying the emotional content is life or death matter to a film • Low emotion = low immersion

  7. How much is hidden? 90 85 80 75 70 65 60 55 50 45 40 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA AAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA • Top of iceberg is 90db • 15db is revealed • Sea of noise level 75db • 35db obscured by sea of noise • Over 2/3 of sound (dynamic range) is buried beneath sea of noise • Bottom of iceberg is >40db

  8. Human hearing 1 75 70 65 60 55 50 45 40 35 AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA AAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA • Normal range 35-72db for speech (intelligibility) • Below 75db sea of noise in cabin • = 0% intelligibility • Good news - No need to have foreign language tracks

  9. Human hearing 2 75 70 65 60 55 50 45 40 35 AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA AAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA • Lose intelligibility if average speech less than 15 db above noise – 75 + 15 = 90db • Narrow range for speech 15 db – average at 90db (unsafe), peaks at 97db • Bad news - Above 85db – no increase in intelligibility – instead oppression and discomfort

  10. How to uncover the iceberg? 125 120 115 110 105 100 95 90 85 80 75 painpainear damageear damage ear damage“unsafe”“unsafe”discomfort A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA AAAAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAA • Can not change noise level - 75db • Iceberg is 50db high (dynamic range) 90db-40db • Can not lift above noise level 5db+75db=125db !!!!! • 90db beginning of “unsafe levels” (D.O.L.), discomfort • 2 hours @ 100db = hearing damage – long flights?

  11. Existing technology ineffective 1 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Squeezes to 30-40db range • Ear discomfort from peaks • Obscured mood fx / underscore • Straining to understand – low intelligibility • Jet noise “in front” of sound track • Like looking through dirty glass • Constant volume adjustments • Little or no immersion in film

  12. Existing technology ineffective 2 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Operates from top down • Characteristics of electronics • Compressor • Limiter • Unnatural • Real life is opposite • Limited by artifact -claustrophobic

  13. Human hearing psychology 1 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Decoding, decoding, decoding • Sound into phonemes • Phonemes into words • Words into language • Language into meaning • Brain overwhelmed • Sound buried in noise • Playing “catch-up” -Trying to figure out what was missed while trying to continue in-the-moment decoding

  14. Human hearing psychology 2 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Failure & frustration • No one likes to feel stupid • Not knowing “what’s going on” • Missing vital information that “others know” • Ability to make emotional associations is blocked by obsession to decode

  15. Brainy brain has no problem 95 90 85 80 75 70 65 60 55 50 45 A AA AAA AAAA AAAAA AAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAAA AAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA • Why we can have a normal conversation above the noise? • Brain uses “reverse-compression” to raise bottom with little affect on top • High intelligibility with acceptable levels • Normal speech pattern -subconsciously adapt to ambient noise

  16. AVX one-ups the brain 1 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Extreme reverse-compress/limitmicro-encodes detail • Top is normal – ‘must be normal’ • Comfortable levels • Dynamic range fits

  17. AVX one-ups the brain 2 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Raises bottom of sound track above noise • Mask effect – sound track is relentlessly dominant • Mind tunes out and soon forgets subordinate jet noise (it wants to)

  18. AVX one-ups the brain 3 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • Enhanced aural cues ~100% intelligibility including spatial cues • Sound decoding easy & relaxing • Brain resources free to make deep emotional associations • High level of immersion in film • Tune out flying – trip is shorter and more enjoyable

  19. Film Clips from SECONDHAND LIONS comparing WAEA 1289-1 spec. audio with AVX encoded audio 75 70 65 60 55 50 45 • Clips mixed with jet noise @~73db for simulation • All clips are at the same volume level • Louder sounds are similar • AVX raises quiet sounds

  20. Per 1289-1 spec. #1 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Inaudible under bridge, cop, plane approach

  21. AVX Encoded #1 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Distinct snoring & ambience under bridge, plane approach

  22. Per 1289-1 spec. #2 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Inaudible off camera speech, music and ambience

  23. AVX Encoded #2 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Speech is intelligible, distinct music and ambience

  24. Per 1289-1 spec. #3 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Inaudible lion growls, weak ambience, lack of presence

  25. AVX Encoded #3 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Distinct lion growls, ambience is dominant, speech has good presence

  26. Per 1289-1 spec. #4 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Inaudible bell-tree, no presence to music and ambience

  27. AVX Encoded #4 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Distinct bell-tree, good presence of music and ambience

  28. Per 1289-1 spec. #5 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Inaudible ambience, unclear speech at end

  29. AVX Encoded #5 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Better ambience, distinct speech at end “learn to do without” & “uh-huh”

  30. Per 1289-1 spec. #6 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Speech is frustrating - unclear, music missing until end

  31. AVX Encoded #6 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Speech is intelligible, music is marginally audible

  32. Per 1289-1 spec. #7 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Speech is marginal, jet noise dominates

  33. AVX Encoded #7 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Speech is crisp and present, music and ambience dominate over jet noise

  34. Per 1289-1 spec. #8 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Jet noise dominates, missing/obscure lion sound,ambience very weak

  35. AVX Encoded #8 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Sound track dominates,lion & ambience clear, presence, “in the movie”

  36. Per 1289-1 spec. #9 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAA AAAAAAAAAA AAAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Jet noise dominates, speech lacks presence,ambience very weak

  37. AVX Encoded #9 A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 Track dominates, speech is intimate & clear, ambience, reverb, presence, “in the movie”

  38. Summary AVX turns the iceberg into a breeze, giving IFE a free ride A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • AVX solves the difficult noise problem for IFE films • Film perceived as intended • High immersion > enjoyment > successful distraction • Greater satisfaction & positive impression of flight

  39. AVX 757 Simulator Demo A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • 5-8 after show, 10 minute drive west near Disney & Warner Bros. • Sound Trax Studios2815 West Burbank Blvd.Burbank 818-842-6300

  40. AVX would like to thank A AA AAA AAAA AAAAA AAAAAA AAAAAAA AAAAAAAA AAAAAAAAAA AAAAAAAAAAAA AAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 95 90 85 80 75 70 65 60 55 50 45 • WAEA attendees • John Salzman • John Eargle & Chris Foreman –sound reinforcement research • Avid Airline Products – headphones • Sound Trax Studios • New Line Cinema

More Related