Sound energy

Introduction

Soundenergyislikelightenergy.Allwaveshaveenergy!Forexample,lightandsoundhaveenergy.Acousticenergyisanenergythatexistsintheformofmechanicalwavesandphonons,justaslightenergyisanenergythatexistsintheformofelectromagneticwavesandphotons.Lightenergyhaswave-particleduality,soundenergyalsohaswave-particleduality,butjustlikelightenergy,theshorterthewavelength,themoreobvioustheparticle.Scientistshaveobservedtheextremelyshort-wavelengthsoundwavesproducedbythecrystallatticeinthesolid.Quantumeffect.Soundenergyisthesameasotherenergies,anditistheenergythathumanscanuse.Whensoundwavespropagateinamedium,themediumwillproduceaseriesofeffectsundertheactionofsoundenergy,suchasmechanicaleffects,thermaleffects,electromagneticeffects,electromagneticwaves(includingradiowaves,lightwaves,raywaves,etc.)effects.

Therangeofsoundenergyformsthesoundfield.Thetransmissionofsoundhasenergyloss,whichisalsocalledabsorption.Whenthedistanceisrelativelylong,wecannotdetectit,andthechangeinsoundstrengthisproportionaltothesquareofthepropagationdistance(theinversesquarelaw).

Whensoundwavespropagateinamedium,ifthereisnomediumtopropagate,therewillbenomechanicalwaves.Whensoundwavespropagatetothesurroundinginterface,reflectionandrefractionwilloccur.

Index

Thespeedofsound(c)isthedistanceofwavepropagationperunittime,andthecommonunitism/s.Indifferentmedia,thespeedoftransmissionisalsodifferent.

Wavelength(λ)isthedistancebetweencorrespondingpointsorthedistancebetweentwoadjacentcrestsortroughsintwoadjacentperiodsintheprocessofwavepropagation.Commonlyusedunitsarem,cm,andmm.

Applicationofsoundenergy

Soundenergy,likeotherenergies,isenergythatcanbeusedbyhumanbeingsandhasawiderangeofapplicationsinreallife.

Heatconversion/heateffect

Usingtheheateffectofsoundenergycanalsosolveheatingorheattreatment.Forexample,infrasoundwavescancausethemoleculesofhumancellstoresonate,rubandheat,similartotheeffectofinfraredraysonthehumanbody,thatis,produceathermaleffect.Peoplecanusethethermaleffectofinfrasoundwavestoprovideheatingorheattreatment.

Electricconversion

Accordingtotheprinciplethattheenergycontainedinmechanicalwaves(soundwaves)canbetransformedintoelectricalenergywhenitencountersabarrierduringpropagation,Britishscientistsdesignedandmanufacturedasoundwavecurrentreceiver.Theconverterthatcanincreasethesoundenergyisconnected,andthesoundenergyisquicklyconvertedintoelectricenergyforusebysomesmallelectricalappliances.Thismethodisexpectedtobecomeanewtypeofgreenandenergy-savingpowergenerationmethod,similartophotovoltaicpowergeneration,called"acousticpowergeneration".

Thelawofconservationofenergy

Thelawofconservationofenergyisoneoftheuniversalbasiclawsinnature.

Generallystatedas:energywillneitherbeproducedoutofthinair,norwillitdisappearoutofthinair,itwillonlytransformfromoneformtoanother,orfromoneobjecttootherobjects,andenergyThetotalamountremainsunchanged.

Itcanalsobeexpressedas:thetotalenergychangeofasystemcanonlybeequaltotheamountofenergypassingintooroutofthesystem.Thetotalenergyisthesumofthemechanicalenergy,thermalenergyandanyinternalenergyformotherthanthermalenergyofthesystem.

Ifasystemisinanisolatedenvironment,itisimpossibleforenergyormasstopassintooroutofthesystem.Inthiscase,thelawofconservationofenergyisexpressedas:"Thetotalenergyofanisolatedsystemremainsunchanged."

Definitionofenergy

Energyisameasureofmaterialmovementconversion,referredtoas"energy".Everythingintheworldisconstantlyinmotion.Amongalltheattributesofmatter,motionisthemostbasicattribute,andotherattributesareconcretemanifestationsofmotion.Energyisameasureoftheabilityofaphysicalsystemtodowork.

Energyisoneofthebasicphysicalpropertiesofmatter,anditisaunifiedmeasureofthemovementofmatter.

Theunitofenergyisthesameastheunitofwork,whichisJoule(J)intheInternationalSystemofUnits.Inatomicphysics,nuclearphysics,particlephysicsandotherfields,electronvolts(eV)arecommonlyusedastheunit,1electronvolt=1.602,18×10^-19focus.Inthefieldofphysics,erg(erg)isalsousedasanenergyunit,and1erg=10^-7joules.

Energyexistsinmanydifferentforms;accordingtothedifferentformsofmovementofmatter,energycanbedividedintomechanicalenergy,chemicalenergy,thermalenergy,electricalenergy,radiationenergy,andnuclearenergy.Thesedifferentformsofenergycanbeconvertedintoeachotherthroughphysicaleffectsorchemicalreactions.Variousfieldsalsohaveenergy.

Expressingtheessence

Commonexpressions:energyisneitherproducedoutofthinairnordisappearsoutofthinair,itwillonlybetransferredfromoneobjecttoanother,orfromoneformtoAnotherform,andintheprocessoftransformationortransfer,thetotalamountofenergyremainsunchanged.

Thefirstlawofthermodynamics:thespecificmanifestationoftheuniversallawofconservationandtransformationinallprocessesinvolvingmacroscopicthermalphenomena.Thefirstlawofthermodynamicsconfirmsthatinanyprocess,theamountofheatabsorbedbythesystemfromthesurroundingmedium,theworkdonetothemedium,andtheincreaseinenergywithinthesystemarequantitativelyconserved.

Thefirstlawofthermodynamicsisthelawofconservationofenergy.Itisasummaryofhumanexperienceandcanalsobederivedbyanalogywiththelawofconservationofmatter.Theenergyofathermodynamicsystemisexpressedasinternalenergy,heatandwork.Thefirstlawofthermodynamicsisanexpressionofenergyconservation.Theconclusionsderivedfromithavenotbeenfoundtocontradictthefacts.Accordingtothefirstlawofthermodynamics,itcanbeenvisagedtobuildamachinethatneitherreliesonexternalenergysupplynordoesitreduceenergyitself,butcontinuouslydoesexternalworkwithoutconsumingenergy.Peoplecallthisimaginarymachinethefirsttypeofperpetualmotionmachine.Becausedoingworkontheoutsideworldmustconsumeenergy,andwithoutconsumingenergy,youcannotdoworkontheoutsideworld.Therefore,thefirstlawcanalsobeexpressedas"thefirsttypeofperpetualmotionmachineisimpossibletocause."Conversely,thefirsttypeofperpetualmotionmachinecanneverbecaused,whichprovesthatthefirstlawiscorrect.