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单词 srt
释义 DictionarySeevoice recognition

SRT


SRT

(1) (Source Routing Transparent) An IEEE-standard that provides bridging between Ethernet and Token Ring networks. Ethernet LANs use transparent bridging, and Token Ring LANs use source route bridging (SRB). The SRT method sends Ethernet packets via transparent bridging and Token Ring packets via SRB.

(2) (Speech Recognition Technology) See voice recognition.

SRT


SRT

Abbreviation for:
substrate reduction therapy (see there)

Spondee Speech Recognition Threshold

Synonym/acronym: SRT, speech reception threshold, speech recognition threshold.

Common use

To evaluate for hearing loss related to speech discrepancies.

Area of application

Ears.

Contrast

N/A.

Description

This noninvasive speech audiometric procedure measures the degree of hearing loss for speech. The speech recognition threshold is the lowest hearing level at which speech can barely be recognized or understood. In this test, a number of spondaic words are presented to the patient at different intensities. Spondaic words, or spondees, are words containing two syllables that are equally accented or emphasized when they are spoken to the patient. The SRT is defined as the lowest hearing level at which the patient correctly repeats 50% of a list of spondaic words. Examples are airplane, hot dog, outside, ice cream, and baseball.

This procedure is contraindicated for

    N/A

Indications

  • Determine appropriate gain during hearing aid selection
  • Determine the extent of hearing loss related to speech recognition, as evidenced by the faintest level at which spondee words are correctly repeated
  • Differentiate a real hearing loss from pseudohypoacusis
  • Verify pure tone results

Potential diagnosis

Normal findings

  • Normal spondee threshold of about 6 to 10 dB (decibels) of the normal pure tone threshold with 50% of the words presented being correctly repeated at the appropriate intensity (see monograph titled “Audiometry, Hearing Loss”)
  • Normal speech recognition with 90% to 100% of the words presented being correctly repeated at an appropriate intensity

Abnormal findings related to

  • Conductive hearing loss
  • Impacted cerumen
  • Obstruction of external ear canal (related to presence of a foreign body)
  • Otitis externa (related to infection in ear canal)
  • Otitis media (related to poor eustachian tube function or infection)
  • Otitis media serus (related to fluid in middle ear due to allergies or a cold)
  • Otosclerosis
  • High-frequency hearing loss (normal hearing range is 20 Hz to 20,000 Hz; high-frequency range begins at 4,000 Hz)
  • Presbycusis (related to gradual hearing loss experienced in advancing age, which occurs in the high-frequency range)
  • Noise induced (related to exposure over long periods of time)
  • Sensorineural hearing loss (acoustic nerve impairment)
  • Congenital damage or malformations of the inner ear
  • Ménière’s disease
  • Ototoxic drugs (aminoglycosides, e.g., gentamicin or tobramycin; salicylates, e.g., aspirin)
  • Presbycusis (related to gradual hearing loss experienced in advancing age)
  • Serious infections (meningitis, measles, mumps, other viral infections, syphilis)
  • Trauma to the inner ear (related to exposure to noise in excess of 90 dB or as a result of physical trauma)
  • Tumor (e.g., acoustic neuroma, cerebellopontine angle tumor, meningioma)
  • Vascular disorders

Critical findings

    N/A

Interfering factors

  • Factors that may impair the results of the examination

    • Inability of the patient to cooperate or remain still during the procedure because of age or mental status may interfere with the test results.
    • Unfamiliarity with the language in which the words are presented or with the words themselves will alter the results.
    • Improper placement of the earphones and inconsistency in frequency of word presentation will affect results.

Nursing Implications and Procedure

Pretest

  • Positively identify the patient using at least two unique identifiers before providing care, treatment, or services.
  • Patient Teaching: Inform the patient this procedure can assist in measuring hearing loss related to speech.
  • Obtain a history of the patient’s complaints, including a list of known allergens.
  • Obtain a history of the patient’s known or suspected hearing loss, including type and cause; ear conditions with treatment regimens; ear surgery; and other tests and procedures to assess and diagnose hearing deficit.
  • Obtain a history of the patient’s symptoms and results of previously performed laboratory tests and diagnostic and surgical procedures.
  • Obtain a list of the patient’s current medications, including herbs, nutritional supplements, and nutraceuticals (see Effects of Natural Products on Laboratory Values).
  • Review the procedure with the patient. Ensure that the patient understands words and sounds in the language to be used for the test. Inform the patient that a series of words that change from loud to soft tones will be presented using earphones and that he or she will be asked to repeat the word. Explain that each ear is tested separately. Address concerns about pain and explain that no discomfort will be experienced during the test. Inform the patient that a health-care provider (HCP) performs the test, in a quiet, soundproof room, and that the evaluation takes 5 to 10 min.
  • Sensitivity to social and cultural issues, as well as concern for modesty, is important in providing psychological support before, during, and after the procedure.
  • Note that there are no food, fluid, or medication restrictions unless by medical direction.

Intratest

  • Potential complications: N/A
  • Observe standard precautions, and follow the general guidelines in Patient Preparation and Specimen Collection. Positively identify the patient.
  • Instruct the patient to cooperate fully and to follow directions. Ask the patient to remain still during the procedure because movement produces unreliable results.
  • Seat the patient on a chair in a soundproof booth. Place the earphones on the patient’s head and secure them over the ears. The audiometer is set at 20 dB above the known pure tone threshold obtained from audiometry. The test represents hearing levels at speech frequencies of 500, 1,000, and 2,000 Hz.
  • The spondee words are presented to the ear with the best auditory response using a speech audiometer. The intensity is decreased and then increased to the softest sound at which the patient is able to hear the words and respond correctly to 50% of them. The procedure is then repeated for the other ear.

Post-Test

  • Inform the patient that a report of the results will be made available to the requesting HCP, who will discuss the results with the patient.
  • Recognize anxiety related to test results, and be supportive of activity related to impaired hearing and perceived loss of independence. Discuss the implications of abnormal test results on the patient’s lifestyle. Provide teaching and information regarding the clinical implications of the test results, as appropriate. Educate the patient regarding access to counseling services. Provide contact information, if desired, for the American Speech-Language-Hearing Association (www.asha.org).
  • Reinforce information given by the patient’s HCP regarding further testing, treatment, or referral to another HCP. Answer any questions or address any concerns voiced by the patient or family.
  • Depending on the results of this procedure, additional testing may be performed to evaluate or monitor progression of the disease process and determine the need for a change in therapy. Evaluate test results in relation to the patient’s symptoms and other tests performed.

Related Monographs

  • Related tests include antimicrobial drugs, analgesic and antipyretic drugs, audiometry hearing loss, culture bacterial (ear), and Gram stain.
  • Refer to the Auditory System table at the end of the book for related tests by body system.

SRT


AcronymDefinition
SRTStreet and Racing Technology (Dodge)
SRTSeattle Repertory Theatre (Seattle, WA)
SRTSubaru Rally Team (racing)
SRTSpecial Response Team
SRTStandard Repair Time
SRTSound Recording Technology (various organizations)
SRTSmart Response Technology (Intel)
SRTSchuylkill River Trail (Pennsylvania)
SRTSouth River Technologies (Annapolis, MD)
SRTSearch and Rescue Team (various locations)
SRTStereotactic Radiation Therapy
SRTSubRip Subtitle (file format)
SRTSingapore Repertory Theatre
SRTSystems Routing
SRTStreet Racing and Technology
SRTSun Reflective Technology
SRTStandard Radio Telecom
SRTSystem Recovery Table
SRTSort Table
SRTSource Rooted Tree
SRTSectional Running Time
SRTService Response Time (computing)
SRTSubsystem Route Test
SRTSource Routing Transparent
SRTSource Route Transport
SRTSingle Render Target
SRTSubrip Title
SRTScale Rotation Translation
SRTStart
SRTSearsport (Amtrak station code; Searsport, ME)
SRTScientific Research Team (various organizations)
SRTSystem Recovery Tool (software)
SRTSpeech Reception Threshold
SRTState Railway of Thailand
SRTSupporting Research and Technology (US NASA)
SRTShelterBox Response Team (UK)
SRTSource-Route Transparent (Cisco - Token Ring)
SRTSmall Radio Telescope
SRTSenior Research Thesis (various schools)
SRTSingle Rope Technique (rappelling)
SRTSilver Ring Thing
SRTSource Routing Transparent (token ring)
SRTSpecial Reaction Team
SRTSoft Real-Time
SRTStreet Racing Technology (Dodge racing)
SRTSegmentation and Registration Toolkit (software; Visible Human Project)
SRTSoftware Reliability and Testing
SRTShetland Recreational Trust (UK)
SRTSystem Recovery Time
SRTStudent Research Team (various schools)
SRTScience Research Techniques (various organizations)
SRTSludge Retention Time
SRTSuper Robot Taisen (video game)
SRTStart-Up Repair Tool (software)
SRTSave the Rhino Trust
SRTSons of the Republic of Texas (Bay City, TX)
SRTScarborough Rapid Transit (Canada)
SRTSecurity Response Team
SRTSecurity Reconnaisance Team (Plano, TX)
SRTSilk Road Tours (China)
SRTSurfactant Replacement Therapy
SRTStudent Research Training (Tsinghua University)
SRTStain Resistant Top (vinyls)
SRTSport and Recreation Tasmania (Tasmania, Australia)
SRTSkid Resistance Tester
SRTSecure Routing Technology
SRTSpill Response Team
SRTSmithers Rapra Technology (The Smithers Group)
SRTSimca Racing Team (France)
SRTSlow Response Time
SRTSocial Responsibility Training (Character Development Systems, L.L.C.)
SRTSachin Ramesh Tendulkar (cricket player)
SRTStation Readiness Test (US NASA)
SRTSocial Representations Theory
SRTShuttle Requirements Traceability (US NASA)
SRTSpecial Rated Thrust (US NASA)
SRTSmart Road Technology, LLC (New Albany, OH)
SRTService Request Ticket (various companies)
SRTSouthern Refrigerated Transport, Inc.
SRTSolids Residence Time
SRTSignal Requests Terminal
SRTSmall Rigid Tag (transponder)
SRTShort Response Trigger (guns)
SRTSynonym Rename Table
SRTSolid Rubber Trussing
SRTStatic Rollover Threshold
SRTService Restoration Team
SRTStandard Remote Terminal
SRTShort Reaction Time
SRTSustainable Returns Team
SRTStrategic Relocatable Target(s)
SRTSawfish Recovery Team
SRTSafety Review Team
SRTScale, Rotation, Translation (3D modeling)
SRTSystèmes Réseaux et Télécommunications (French: Networks and Telecommunications Systems)
SRTStandard Rate Turn
SRTStructure Rule Table
SRTScheduled Return Time
SRTSlower than Real Time
SRTSingle Row Termination
SRTSequential Resonant Tunneling
SRTSociété des Régates de La Turballe (French: Regatta Society of La Turballe; La Turballe, France)
SRTSupply Response Time (Boeing FIRST award fee criteria)
SRTShipboard Receive Terminal
SRTStation Redesign Team
SRTShort Range Transport Aircraft
SRTSpent Resin Tank
SRTSupplier Response Time
SRTShelf Ready Tray (various companies)
SRTSequential Ranking Test
SRTSilicon Resistance Thermometer
SRTShipboard Readiness Test
SRTSeamonster Response Team
SRTSubsystem Routing - Test (ANSI)
SRTSector Reallocation Threshold
SRTSystems Readiness Test
SRTSubscriber Radio Terminal
SRTSystem Requirements Tree
SRTStudent Resourse Time
SRTSouthern Regional Transport, Inc.
SRTSpectral Research & Technology, Inc.
SRTSoftware Review Team
SRTStation Return Time
SRTSlow Run Through/Trials
SRTShared Ride Transit
SRTSpin Resonance Transistor
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