[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-347670-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-347670-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","ultrasound-physics-definitions","Ultrasound Physics - Definitions","","Ultrasound Physics focuses on foundational physics concepts for ultrasound, starting with definitions of sound as a mechanical, longitudinal wave involving compressions and rarefactions. It explains key acoustic variables such as acoustic intensity-related measures through pressure, density, distance, and particle motion, along with core wave parameters including transverse and longitudinal wave behavior. It further covers period and frequency concepts, relating audible sound ranges versus ultrasound and illustrating their inverse relationship and typical units for clinical interpretation.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/exam/","Exam",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/ultrasound-physics-definitions/347670/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/ultrasound-physics-definitions/347670.png","ImageObject",300,407,{"name":42,"@type":43},"Taylor Morgan","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-27","2026-09-22",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",10,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What is sound, according to the document definitions?","Question",{"text":63,"@type":64},"Sound is defined as a type of wave created by vibration that travels through a medium as compressions and rarefactions. It cannot travel through a vacuum.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How do transverse and longitudinal waves differ in particle motion?",{"text":68,"@type":64},"In transverse waves, particles move perpendicular (at right angles) to the direction of propagation. In longitudinal waves, particles move in the same direction as the wave’s propagation.",{"name":70,"@type":61,"acceptedAnswer":71},"What is the relationship between frequency and period in ultrasound physics?",{"text":72,"@type":64},"The document states that as frequency increases, period decreases, and as frequency decreases, period increases. 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Edelman\u003Cbr>Director, ESP Ultrasound [edelman@esp-inc.com](edelman@esp-inc.com)[ ](edelman@esp-inc.com)[281-292-9400](281-292-9400)\u003Cbr>[www.esp-inc.com](www.esp-inc.com) | , Ph |  | . D. |\n|  | Definitions |  |  |  |  |  |  |\n|  | Sou | nd |  | A type of wave that carrie\u003Cbr>• Created by the vibratio\u003Cbr>• Sound waves are comp pressure or density 􀁜 ) pressure or density 􀁜 ) .\u003Cbr>• Sound cannot travel th travel through a mediu\u003Cbr>• Sound is a mechanica\u003Cbr>• Sound travels in a stra | s e\u003Cbr>n o\u003Cbr>rised and\u003Cbr>rou\u003Cbr>m .\u003Cbr>l, l\u003Cbr>ight | ner\u003Cbr>f a\u003Cbr>o\u003Cbr>ra\u003Cbr>gh\u003Cbr>􀁜\u003Cbr>on\u003Cbr>lin | gy from place to place. moving object. f compressions (increases in refactions (decreases in\u003Cbr>a vacuum—sound must gitudinal wave .\u003Cbr>e . |\n|  |  |  |  |  |  |  |  |\n|  | Acoustic Varia\u003Cbr>Pressure\u003Cbr>Dens\u003Cbr>Distance | bl\u003Cbr>ity | es | Acoustic variables specific an acoustic variable ch\u003Cbr>wave is present. Concentration of force wit Concentration of mass wit Measure of particle motion | ally\u003Cbr>ang\u003Cbr>hin\u003Cbr>hin\u003Cbr>. U | id\u003Cbr>es\u003Cbr>an\u003Cbr>a v\u003Cbr>nits: | entify sound waves. When rhythmically in time, a sound\u003Cbr>area. Units: Pascals (Pa)\u003Cbr>olume. Units: kg/cm 3 cm, feet, miles |\n|  |  |  |  |  |  |  |  |\n\nEdelman · Ultrasound Physics  \nUltrasound Physics · 1  \n\n|  |  |  |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  | Waves\u003Cbr>Transverse Wav\u003Cbr>Longitudinal Wav |  | e 􀁜\u003Cbr>e 􀁜 |  | Particles move in a directio the direction of the wa | n p\u003Cbr>ve:\u003Cbr>dir\u003Cbr>| erp\u003Cbr>ection | endicular (at right angles) to |  |  |  |\n|  |  |  |  |  |  |  |  | of propagation\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>vibration of particles |  |  |  |\n|  |  |  |  |  | Particles move in the sam | e di | rec |  |  |  |  |\n|  |  |  |  |  |  |  |  | tion as the wave: |  |  |  |\n|  |  |  |  |  |  | dire | ction | of propagation\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>tion of particles her density & pressure r density & pressure\u003Cbr>nd waves: |  |  |  |\n|  |  |  |  |  |  | of\u003Cbr>f lo | \u003Cbr>vibra hig\u003Cbr>we |  |  |  |  |\n|  |  |  |  |  | Compressions are regions Rarefactions are regions o |  |  |  |  |  |  |\n|  | Seven parame |  | te | rs | that describe | so | u |  |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |\n|  |  |  | Fr\u003Cbr>A\u003Cbr>I | Peri\u003Cbr>equ\u003Cbr>mpli\u003Cbr>Pow\u003Cbr>nten | odency\u003Cbr>tudeer sity | Spe\u003Cbr>Wav | ed\u003Cbr>elen | gth |  |  |  |\n|  | N |  | ote |  | Acoustic variables ident\u003Cbr>Acoustic parameters de sound waves | ify\u003Cbr>scr | sou\u003Cbr>ibe | nd waves\u003Cbr>the particular features of |  |  |  |\n|  |  |  |  |  |  |  |  |  |  |  |  |\n\n2 · Ultrasound Physics ESP, Inc.©  \n\n|  |  |  |  |  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |\n|  | Period\u003Cbr>Definit\u003Cbr>Exam\u003Cbr>Un\u003Cbr>Typical Values | ion\u003Cbr>ple\u003Cbr>its |  | The time required to com Period can also be describ\u003Cbr>cycle to the start of the The period of the moon ci The period of class in high 􀁐sec, seconds, hours—all 0.1 to 0.5 􀁐sec 0.0000001 to 0.0000005s 1 x 10-7 to 5 x 10-7 sec |  |  | pleted n\u003Cbr>rc ling\u003Cbr>sc\u003Cbr>uni\u003Cbr>ec | e a\u003Cbr>as t\u003Cbr>ext\u003Cbr>thoo\u003Cbr>ts o | single cycle.\u003Cbr>he time from the start of a cycle.\u003Cbr>he earth is 28 days. l may be 50 minutes. f time |\n|  | Determined Changed by Sonographer | By |  | Sound source\u003Cbr>No |  |  |  |  |  |\n|  |  |  |  | \u003Cbr>\u003Cbr>\u003Cbr> one period  |  |  |  |  | time |\n|  | Frequency |  |  |  |  |  |  |  |  |\n|  | Definit\u003Cbr>Un\u003Cbr>Determined Changed by Sonographer | ion\u003Cbr>its\u003Cbr>By |  | The number of certain eve duration.\u003Cbr>In diagnostic ultrasound, tas the number of cycle in one second.\u003Cbr>per second, -s-----e-------n- , Hertz,\u003Cbr>Sound source No |  |  | nts\u003Cbr>he\u003Cbr>s o\u003Cbr>H | th\u003Cbr>freq\u003Cbr>f an\u003Cbr>z | at occur in a particular time\u003Cbr>uency of a wave is described acoustic variable that occur |\n|  |  |  |  |  |  |  |  |  |  |\n\nEdelman · Ultrasound Physics  \nUlt","cbCaij5QIeSaGZjS","https://ap.wps.com/l/cbCaij5QIeSaGZjS","pdf",630596,47,"English","# Definitions\n## Sound\n## Acoustic Variables\n## Waves and Particle Motion\n## Period\n## Frequency\n## Audible Sound vs Infrasound vs Ultrasound\n## Frequency and Period Relationship","[{\"question\":\"What is sound, according to the document definitions?\",\"answer\":\"Sound is defined as a type of wave created by vibration that travels through a medium as compressions and rarefactions. It cannot travel through a vacuum.\"},{\"question\":\"How do transverse and longitudinal waves differ in particle motion?\",\"answer\":\"In transverse waves, particles move perpendicular (at right angles) to the direction of propagation. In longitudinal waves, particles move in the same direction as the wave’s propagation.\"},{\"question\":\"What is the relationship between frequency and period in ultrasound physics?\",\"answer\":\"The document states that as frequency increases, period decreases, and as frequency decreases, period increases. If one remains unchanged, the other is also unchanged, reflecting an inverse relationship.\"}]","Ultrasound Physics - Definitions | PDF",1790068474,118]