An audiogram is a graph which indicates how well one hears a range of sounds. An audiogram indicates the softest levels of sounds that a person can hear. It is used to determine whether a person is hearing within normal limits, or whether a person has a hearing loss. It also indicates the nature of the hearing loss i.e. conductive, sensorineural or mixed. Using an audiometer, the tester will produce different pitches at varying levels of loudness. The softest sound that the individual can hear at each pitch is recorded on the audiogram.  Using an audiometer, the tester will produce different pitches at varying levels of loudness. The softest sound that the individual can hear at each pitch is recorded on the audiogram.  In decibels (dB). The decibel is the unit of measurement for loudness. On the audiogram, the range of decibels is displayed along the vertical axis and extends from -10 dB to 120 dB. -10 dB represents extremely soft levels, whereas 120 dB represents extremely loud levels.

How are the different pitches measured?

Hertz (Hz) are the unit of measurement for pitch. On the audiogram, the range of pitches is displayed along the horizontal axis and extends from 125 Hz to 8000 Hz. Like a piano, the pitches start off low (125 Hz) and end up in the high range (8000 Hz). The pitches used in hearing testing are most often 250, 500, 1000, 2000, 4000 and 8000 Hz. These are the pitches most important for speech.

Speech Frequencies

Low-pitched sounds (ex., 250 & 500 Hz) include most of the vowel sounds as well as consonants such as "m," "n," "b," and "g."High-pitched sounds ( 2000 - 6000 Hz) include many consonant sounds such as "s," "t," "f" and "sh." The other consonant sounds are found throughout the mid-frequency range.

Types Of Testing

There are two kinds of testing: air conduction and bone conduction.

Air conduction testing for the right ear is marked O and D; the left ear is marked X and ÿ. Air conduction is the passage of sound by air (through the headphone, insert phone or speaker) to the ear drum and subsequently to the ossicles (tiny bones in the middle ear) and the cochlea (inner ear). This leads to stimulation of the nerve cells of the inner ear.

Bone conduction testing for the right ear is marked [ and < ; the left ear is marked ] and > When no response is obtained, this is marked ¯ When soundfield is used to test, the responses for the better ear are marked S and W. Bone conduction is the passage of sound through the bones of the skull to the inner ear. This is done through the placement of a bone vibrator behind the ear, which sends the sound directly to the inner ear through the vibration of the skull. As opposed to air conduction, this bypasses the outer and middle ear.

icsatc neodeme advancedstructurescorp floormachinebrush scpe jcamasonry sages-tunisie sbsteel technomailleplus bolkan vaalea nsblueprinting mycleanairdoctors nycgeneralproroofing gabgadgets prsnekkern uniquescaffoldingsystems villaguicciardini acerpackaging acjstucco prontointervento-multiservice printersupplygiant sarel takkatiimi dragonshollow mazelsupply alfalchetto reliablegeneralagency lckenterprises realizzazione-giardini dmcindustries shop chathambrass ilfaroservizi soilmechanicsdrilling colorfullyyours agcsound carriere carnavaldetournai falconauto codingxcamp davinci-trondheim thebestofcolumbia cooperativetissage outsourcedmarketingpros tlc dawnnhough doubleclick pdirealty hattrennet az-bizsolutions jamaistropdart frontdata unitycreations fortisarezzo bspo-ken codar-confection theboulders bakerpersonnel fantasyphotographyandvideo fuleky tanssikoulutria ladybi swimanddance scuolavelatoscana x-pack creativeglazing lucagnizio sigaretteelettronichepisa mayiindustries frigo-clim elgars leoemma hotelalcantara el-pro therefore thebestofjacksonville nykran masmoudi thebestofspokane cogepre detrecruitment laresidencelepartage chimneycompanyboston awarepedia res-botanica recipefy semap thebestofcincinnati bb-one fourtech thebestofjoliet ajproduce jerryshulmanproduceshipper lckcabinetryny drivingtechniquesmadeeasy accademiaestetica pizzamaison schoonheidssalonbianca cabinsbrevardnc mrbrushes atlasrolloff hatip-medikal vezcocorporation thebestofcoloradosprings filtaclean monteleeper flyfisher ellatafa associazionepugliesiapisa unitycreationsltd maketeamstudiot douglasclear packagingpro softm allstarbeerinc burtonsupply footballscouting profondacreation johnvravickddsms fireislandbuilder advancedcontrolsolutions chittorgarhtaxiservices live-now orologeriatoscana racinemode thebestofwilmington agro-services violiner sandinghouse the-complete-package thebestofrichmond rcollision meubleskarray mes-recettes lawsandtaxes tavgrupp mkproducts royscottmarine taxi contreras-stockman sigmaweb de-noord thebestofkansascity maisonmedicaledelaeken recycledrubberpavers surfacingsystems unitedfidelityinc enokplan hunterremodeling edmersupply amerequipint sanilabcorp igglesis christiannursingregistry united-royal cantodelfiume northsidedeliny menuiserie-delbart passeritartufi justmyvoice ablefiresprinklers accantoalcentro ckperformance khalfallahpneus anti-flood-barriers bmstyle autosangiorgio-mercedes-benz carmagnino viipurinurheilijat multipack cma-eng mcafeerealty adrianaperciballi loconteedilecostruzioni konarprecision unityrubberco unityrubberproducts dante tela marathongranite baltimahalworcester heimdalbygg alstateprocessservice italydreamtour wemcocastingllc yachtbritesigns ecoledecroly-renaix anchorseniorapartments royalburton sk-veilag giannacapoti hubiteg customcommercialconstruction edm-nivelles probat-tunisie bachlawyer robertex inbora gpbconstruction tekstschrijver-tim bdsit trepro himalayanlounge lazersharpplumbing nycollisionking marinanova gealcorp nygabe maritimecoverage justmyvoice jukumech quimicolsa hayat-med aldrovandiauto michaelbenaltinc korenas sandvet americanmufflerautorepair justmyvoice liacoustics dminteriors agenziapromotech ligbtour internormfirenze justmyvoice zouila kohalmiferenc ashgroveresort ilmacinapepe suzukibandit hihna islandfishli prontointerventofabbro24h thebestofmidland thebestofportland dsgnaturaeambiente rimpex-medical giadaguidi royalroseappliances normas monicavignoliniluxury reddalsand defigners projektorilamput qtbservices labandas totalconceptdesign elannonnayttamo begmaterialiedili bardsdans samuelmanndds marksmenmfg demo17 chinafinewines coralia ivar-moe tournailesbains consew luisaprofumeriashop chimneycompanywestchester danapoly 268dental uspaerospace melonerp matcoservice emperorsoft cantare fninc greenpowerchemical westendsupply domobios unitysurfacingsystems martemoen hamptonssepticservices housatonicpaper sj-transport epsl-tunisie sungoldabrasives collinscreative barbarottomachinery soep thebestofalexandria straightlineconst itcimpianti hattrem-trafikkskole federalnetworks ppattorneys ceteau fbperformance coltgateway coolservice4u garaconfection bellformalwear abcconcretepumping mysantaria accurateindustrialmachining schmugerhardware thebestofjackson bellwetherstaffing sweetkarmadesserts tonerhuset mongilschool polycliniquelaouani buonidentro schoolbusmirrorsonline qlstransportation andereuropa cleanpressiondrycleaner bsyd planetlimony thebestoflasvegas csgmfoodequip potensial potiez invitiing tomscorvetteshop thebestbaltimorebusinesses honefoss thebestofoakland hydeparkdenim scmanndds sirreal totalpreferredsupply futureshockcorp myrtun