heaig is a asiaig sesai - head acousticshead acoustics gmbh ® – 8 – prof dr-ing laus genuit...

Hearing is a fascinating sensation

Prof. Dr.-Ing. Klaus GenuitExecutive director, HEAD acoustics GmbH

Herzogenrath, 23rd September 2011

25 Years HEAD acoustics GmbH

HEAD acoustics GmbH ®

www.head-acoustics.com – 2 – Prof. Dr.-Ing. Klaus Genuit

HEAD acoustics GmbH

• WasfoundedinAugust1986 • Employsmorethan150people • Isamemberof – FVV,DEGA,SAE,ASA,ASJ,AES,VDI,… • Consistsoftwobusinessdivisions – NoiseVibrationHarshness(NVH) • Automotive • IT • Appliance • Officeequipment • EnvironmentalNoise,SoundScape – Telecom • Measurementtechnologyfortelecommunications,electroacousticsandhearingaids • Applicationsforanaloganddigitaltelephony,internettelephony(VoIP),mobile telephonyandhands-freephonesystem • Consultingandresearch



„Let Your Ears Decide“

• FromthebeginningHEADacousticsislookingforwhatkindofsoundthehumanbeingperceives – Perceptionofsoundindependencyofcontext

• Notonlyvaluesordiagramsareimportantbutthetimesignaloftheleftandrightear

• AllproductsofHEADacousticsarefollowingthisconcept:weneedbinauraltimesignals – Artemis – Prognoise – BTPS,BPCA – HEADVISOr – NoiseMapping



Integrated System Solutions

SoundDesignTroubleShooting

InteriorNoiseSimulation SoundQuality

JuryTesting

ExteriorNoisePass-byNoise

DataAcquisitionAnalysisPlayback

CustomizedSolutions


www.head-acoustics.com –5– Prof. Dr.-Ing. Klaus Genuit

Psychoacoustics: Physics <-> Psychology

• Objectivedescriptionofhearingeventsdoesnotonlydependonphysicallymeasurableand describableparameterslikeloudness,sharpness,roughness,fluctuationstrength

• butalsoonpsychological,cognitivecomponentsasexperience,expectationandattitude.

• Thismeansthediscipline“Psychoacoustics”isrelatedtootherdisciplinesashearingacoustics, roomandbuildingacoustics,architecture,soundscape,environmentalnoise,psychology,music science,butalsomarketing(productsounddesign)etc.



PhysicalAspects

Psycho-acousticalAspects

PsychologicalAspects

DesignAspects

Marketing

Sociology

MechanicalEngineering

AcousticsPhysiologyMusicalTheory

CommunicationsEngineering

Physics

Psychology

ProductSound

Optimization

SQ Aspects

Disciplines



Adaptivity of Human Hearing

• NVH-SoundQualityisaneverendingstory: – Ifthelevelofonesoundsourceisreducedthenextonecanbeheard – Causedbytheadaptivityofhumanhearingthesensitivityincreases;aquietervehiclemay bemorenoisy – Basedonotherdemands-reductiononweightandemission-newNVHproblemscanbeobserve


• NVH-Sound Quality is a never ending story: – If the level of one sound source is reduced the next one can be

heard – Caused by the adaptivity of human hearing the sensitivity

increases; a quieter vehicle may be more noisy – Based on other demands - reduction on weight and emission - new

NVH problems can be observe

Complaints about Engine Noise

Identification and Complaints about

Tire Noise Optimization Tire Noise


Wind Noise


Noise of Auxiliaries Optimization Noise of Auxiliaries

„Today, cars are so quiet that you can hear everything.“


„Today, cars are so quiet that you can hear everything.“



Complexity of Psycho Acoustical Parameters

• Singlenumbersarenotuseful

• Interactionbetweendifferentparametersisunknown – LoudnessSharpness

– roughnessFluctuation

• Itisnotatgeneralpossibletodescribesoundqualityonlybasedonpsychoacousticalparameter – SoundofoneproductasafunctionofN,S,r,Fmaybegood – Anothersoundofadifferentproductwithsameparametersmaybenotbeacceptable



General Remarks – Problem of Superposition

Therearenogeneralruleshowtocalculatesoundqualityparametersforasuperposition ofseveralsoundsourcesbasedontheparametersofsinglesoundsources



Sound Quality <-> Speech Quality

• Twofieldsofbusiness

• Overlapwithcustomerslikeautomotive

• MobilitymeetsCommunication



Future of HEAD acoustics

• Thenext25years:

– ImportanceofSoundQuality? • Automotive->Mobility->Lifestyle • Appliance • Office • WorkingPlaces • SoundScape

– Communication? • Mobility • Lifestyle



Automobiles in Change - Replacement of Motives

• Vehicledevelopmentandsocialchangesleadpermanentlytonewqualitycriteria

• Firstpragmatic,functionalcriteria(objectivedata)wereimportant

• Thesecriteriawerereplacedbythecustomerwishesforemotion,excitement,pleasure, comfortwhiledriving

• Duetoarecentsocio-politicalchangeecological-relatedcriteriaareemphasized

• Advertisementisanimportantindicatorfornewmotivesandchangesofrelevantqualitycriteria



New Challenges in the Automotive Field

Increase of vehicle classes / diversification

Shortened development cycles

Tightened ecologicalspecifications

Less real prototypesNew engine

concepts

Growing expectations regarding comfort

Vehicle Development

– Needforadvanced,innovativetechniquesandtools – Needforholisticapproachestoguaranteehighestquality



Overall Consideration

• SeparationofdifferentNVH-relateddepartmentswithrespecttoconception,planning, development,productionandEoLisnotrecommendable(e.g.NVH,breaks,S&r)

• Sounddesignisimportantwithrespecttothedevelopmentofgoodoverallcharacter – compositioninsteadofreaction

• StyleandCharactercanonlybeachievedbyawell-balanced,harmoniousoverallconcept– ahighoverallcomfortlevelisessentialforhighestperceivedquality



NVH – Challenges in Future

• reductionoffuelconsumptionandemissions

• reductionofweight

• Newdrivesystems(acousticsofalternativedrives)

• Increasingimportanceoftire-roadnoise

Newtasks,newfieldscanonlybehandledwithinnovativetools,methodsandconsultingservices: "Fun"factorwillbeimportant "Lifestyle"vehicles Electricpowered(fuelcelltechnology),4electricdrivers(wheelhubmotor),ateachwheelfordriving, braking,recuperation,controldrivingdynamics(ABS,ASr)



Sound Development Trends for Electric Vehicles

Sounddevelopmenttrendsfortheelectricvehicle

Developmentofinteriorsoundstakingintoaccountsoundquality,acousticalfeedback,brandimage

Authenticity

Preservation of electric drive

sound

Meeting traditionalsound expectations

Generation of soundsrelated to combustion

engines

New soundsstarting from scratch

Creation of newsounds suitable for

electric cars



Holistic Sound Quality Approach

Measurement of NoiseAccording to Human Hearing

Listen to the Sound and Judge

Optimization ofProduct Sound Quality

Find the Source and PathsCausing Noise

Analysis of NoiseAccording to Human Hearing

Measurement of NoiseAccording to Human Hearing

BinauralTechnology

Psycho-acousticAnalyses

BTPA,BPCA

BTPS,Simulations

Realistic Play-back in Lab

or Real Cabins



Process of Vehicle Sound EvaluationProcess of Vehicle Sound Evaluation

Action Acceleration, deceleration, brake, Constant

speed,…

Reaction sound and vibration, performance

of the vehicle

This complex interplay cannot be sufficiently

reproduced in laboratory!

Sensation (introspective evaluation)

Matching with experience, expectation, overall impression

Evaluation and Adjustment of the vehicle and sound respectively

23



Determination of Sound Quality

Real Car

Highestauthenticitywithrespecttotestdriveandassessedvehicleinteriornoises

SoundCar (Stationary Driving Simulator)

•Interactivesimulationofvehicle interiornoiseaswellasvibrations atseatandsteeringwheel•Simulationperformedseparately forengine,windandrollingnoise

„UserInterface“:acceleratorpedal,brakepedal,gearshiftlever,

dashboardinstruments

H3SMobile Driving Simulator

•Simulationofvehicleinteriornoise throughheadphoneswithahigh absorptionofexternalsound(ANC)•Vibrations,drivingdynamicsare providedbytherealbasevehicle

„UserInterface“:acceleratorpedal,brakepedal,gearshiftlever,dashboardinstruments



Target Sound Development Using EVE

EVE(*):

ExplorativeVehicleEvaluation

(*)DevelopedbyBrigitteSchulte-Fortkamp,TUBerlin

Prof.Dr.-Ing.KlausGenuit

Test Drive –Evaluation of Vehicle Sound

Acoustical Analysisand Interview Analysis

Modification of Vehicle Sound

Test Drive –Evaluation of New Vehicle Sound

Product Related Target Sound

MobileDriving

Simulator

SoundDesign

Psycho-acoustics

GroundedTheory

MobileDriving

Simulator



Open Questions for New Powertrains

• Whatproductsoundsdocustomersprefer?

• Whatkindofsoundsareimportantforcustomers?

• Howtoconsiderthetypicalacousticalorientationknownfromcombustionnoises?

• Shoulditbepossible,thatacustomercanactively/individuallyinfluencethecharacterofthe vehicleinteriornoise?

• Whichnewsoundsariseandmustbeavoidedoremphasized?

• Howtodesignvehicleexteriornoise?(e.g.pedestrianprotection)



The Revolution Seems to be Inevitable …

ShellScenario„Auto-MobilityinTransition”forGermany(Shell,2009)

Others

Electric

Hybrid

Diesel

Gasoline

Newly-registeredCars

Thisscenarioischaracterizedbyrapidtechnologicalchangeandgreaterdiversificationofpropulsionandfueltechnologies.Butconventionalpropulsionsystemsandfuelswillstillbeplayingakeyrolein2030.



2009



HEAD acoustics’ Prognosis

2030greatamountofelectricvehicles(newly-registered-cars)

• Expectationofaconsiderablehigherproportionofelectricvehiclesinthefuture• Lesshybridvehiclesexpected

69,6

30,442,7

56,9

49,0

48,8

30,0

41,0

19,0

10,0

22,0

30,0

28,0

20,0

15,0

20,0

25,0

40,0

60,0

20,0

10,0

10,0



Change of Traffic

PrognosisbyGEcompanyhttp://www.ge.com/thegeshow/electricvehicles/

• Changeoftraditionalmobilityconcepts,trafficfleetcompositionandtravelbehavior • EUroadmap(Whitepaper2011):“Halvetheuseof‘conventionally-fuelled’carsinurbantransport by2030;phasethemoutincitiesby2050”



Reduction of Costs, Increase of Production



The Future is Already Reality



Mobility and Communication

• Constantavailabilityisanewtypeofslavery – Mobilityisahumanbasicneedandatthesametimeaneconomicfactor – Butmoreandmorepeoplecannotandwillnotbowtotheideaofamobilesociety

• QuaVadis,mobility? – Thefutureofmobilityisintheintelligentcombinationoftransportationmeans,notagainst, butwitheachother

• Unlimitedmobilityimpliesunlimitedcommunication

• Wherearethelimitsofmobility? – Theissue“mobility”hasanimportantrelevanceinoursociety

FAZ, 13.09.2011



What does this mean for HEAD acoustics?

• SoundQualityisaluxuryattributeofproducts • Thatmeans:theimportanceofourcompetencedependsnotonlybytheproducts buthastobeseeninthetotalcontextoflife

• SuccessofHEADacousticsisnotindependentofhumanwell-being



futureofhumanbeingandwell-being

mobility communication




mobility

HEADacoustics

communication




paradigmchange

evolution

innovation

revolution



energyresources

socialmobilitytransportation

technologyefficiency

moneyfinances

qualityofenvironmentecology

comfortablelifelifestyle


peacesafetytolerance

educationcommunication&

networkinginformation

healthywell-being




evolution

innovation

revolution



attitudeofcarmanufactures

customerreactions

infrastructurefuture of

human being and well-being

governmentsincentives

price&reliability spaceatmega-cities



Potential for E-Vehicles

• Economic-politicalpressureandchangesinconsumerbehavioraffectthefutureofthe automotiveindustry • AccordingtotheinternationalconsultingagencyBooz&Companytheautomotiveindustrymoves inacriticalenvironment.Themainreasonsforthatareontheonehandtheeconomic-political demandsforeco-friendlyvehiclesandontheotherhandthechangingmobilitybehaviorofthe customers.

• Flexibilityandlifestyle: – Thevehicleindeedisandstaysaprestigiousobject,butthepropertyofanown,preferably powerfulvehiclecountslessfortheyoungergeneration – Thenewmobilityconsumeremphasizesflexibilityand(“green”)lifestyle.“Thevehicleshallnot becomeanunemotionalmeansoftransportation.Thusthemanufacturersdeveloprealnew ideasaroundthevehicle.”



attitudeofcarmanufactures

customerreactions

infrastructure E-Mobility governmentsincentives

price&reliability spaceatmega-cities



New Business

• Combustionengineconsitsonseveralthousandparts,theelectricmotoronlyonsomedozenparts • Combustionengineproducessound/noiseandvibration,theelectricmotoronlysomesound, novibration

• Doweneedexhaust&intactsystems,doweneedpistons?

• Completenewbusinessfieldswillbeneeded



Conclusion

• Aftermorethen120yearsdevelopmentofvehicleswewillgetnowabigchangeintheautomotivefield – Newimageofthevehicle:->“green”car – Differentpowertrains – Completenewsounds,insideandoutside – Newtechnologies,newkindofengineering – Newlifestyle • Newideaswithrespecttomobilityandcommunication

• MobilitymeetsCommunication

• Theneedforinterdisciplinarycooperation

• Bigchallengeforthefuture

• Bigchallengeforthepsychacoustics

• BigchallengeforHEADacoustics



Let us start together into a new period withbetter sound and improved communication

heaig is a asiaig sesai - head acousticshead acoustics gmbh ® – 8 – prof dr-ing laus genuit...

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