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Gerasim Silin
Gerasim Silin

Audiometer


An audiometer is a machine used for evaluating hearing acuity. They usually consist of an embedded hardware unit connected to a pair of headphones and a test subject feedback button, sometimes controlled by a standard PC. Such systems can also be used with bone vibrators, to test conductive hearing mechanisms.




audiometer


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Audiometers are standard equipment at ENT (ear, nose, throat) clinics and in audiology centers. An alternative to hardware audiometers are software audiometers, which are available in many different configurations.Screening PC-based audiometers use a standard computer.Clinical PC-based audiometers are generally more expensive than software audiometers, but are much more accurate and efficient. They are most commonly used in hospitals, audiology centers and research communities. These audiometers are also used to conduct industrial audiometric testing. Some audiometers even provide a software developer's kit that provides researchers with the capability to create their own diagnostic tests.


An audiometer typically transmits recorded sounds such as pure tones or speech to the headphones of the test subjectat varying frequencies and intensities, and records the subject's responses to produce an audiogram of threshold sensitivity, or speech understanding profile.


Medical grade audiometers are usually an embedded hardware unit controlled from a PC. Software audiometers which run on a PC are also commercially available, but their accuracy and utility for evaluating hearing loss is questionable due to lack of a calibration standard.


The most common type of audiometer generates pure tones, or transmits parts of speech.Another kind of audiometer is the Bekesy audiometer, in which the subject follows a tone of increasing and decreasing amplitude as the tone is swept through the frequency range by depressing a button when the tone is heard and releasing it when it cannot be heard, crossing back and forth over the threshold of hearing. Bekesy audiometry typically yields lower thresholds and standard deviations than pure tone audiometry.


In audiometric testing a variety of equipment is used to conduct different types of tests. In audiometers we differentiate between screening audiometers, diagnostic audiometers and clinical audiometers. At MAICO we focus on screening and diagnostic audiometers. A screening audiometer is used to identify a potential hearing deficiency. A failed screening would require a referral for a full diagnostic test battery. A diagnostic audiometer would be the first device used in the full diagnostic test battery. It is used to identify and quantify hearing disorders as well as their possible origins and therefore has more functions and flexibility than the screening audiometer.


A diagnostic hearing tests follows if a patient has failed a hearing screening test. The diagnostic hearing test is used to verify a hearing loss, determine the extent, the type and the cause of the hearing loss. The hearing test will usually be performed by an audiologist with the help of a diagnostic audiometer. A diagnostic hearing test can be conducted on people of any age and consists of a variety of tests. The most common test battery consists of: air conduction, bone conduction, speech testing or overthreshold testing. The diagnostic test determines the softest sound the patient can hear and normally starts with the ear which the patient thinks has better hearing.


We offer audiometers that will help you carry out audiometric tests and procedures with ease. Choose between diagnostic or screening audiometers with a variety of different testing functions such as the automated Hughson-Westlake test or SISI. Audiometers from MAICO are designed for two different applications, screening audiometry and diagnostic audiometry. They are available as portable audiometers or as tabletop devices. Patient data and test results can easily be retrieved, stored, and printed by connecting our audiometers to your PC.


MDH recommended audiometers have test tones ranging from 250 to 8000 Hz and volumes of 0-80/100 decibels, this allows the screener to perform both pure tone audiometry screening and threshold screening.


Avoid extreme temperatures (below freezing and above 90º F). Keep cords free of tangles and twists. Check all electrical connections, dials, and switches for signs of problems. The headphone jacks should be removed from their plugs occasionally and wiped with an alcohol pad to improve the connection (Note: Do not use alcohol pads on the headphone ear pieces). Take proper care to prevent moisture from getting inside the audiometer.


To ensure that the audiometer is ready for accurate screening, the person with primary responsibility for the hearing screening program should do biologic calibration checks. Perform this check prior to threshold screening or when there is reason to suspect the audiometer may not be working properly. Use procedure described below. Refer to the Biological Calibration Check Form (PDF).


Combining style with functionality, the Amplivox 116 is the ideal manual screening audiometer for primary care, schools and industry. It offers a comprehensive air conduction threshold facility at a very affordable price...


The Amplivox 260 audiometer incorporates many innovative features which make it the ideal choice for conducting diagnostic audiometry. Specifically designed for operator ease of use and with a weightof just 830g, the Amplivox 260 is very portable...


AMTAS Flex is a stand-alone test that uses a tablet with no audiometer required. Flex offers screening and diagnostic air conduction audiometry. The screening test typically takes 1-2 minutes to complete...


A one-and-a-half channel audiometer that offers air, bone, and speech audiometry, The GSI Pello grows with your practice. Its familiar design and large color display enables seamless performance of all tests...


The AC40 is a full-featured state of the art audiometer that is a true hybrid combining a stand-alone and PC-based audiometer into one unit. This audiometer features two independent channels that are configurable for either right or left hand operation...


With the ability to perform fast and accurate air/bone conduction and speech testing, the MedRx AVANT (Stealth) Audiometer is a two-channel audiometer with a modern design, USB connectivity to any PC, and equipped with excellent counselling/fitting tools...


To ensure that all audiometers perform consistently, Texas law requires that they be registered and calibrated. The law also requires people who use audiometers to be registered. (See Texas Health and Safety Code, Chapter 401.Texas Regulations for the Control of Infrasonic, Sonic, and Ultrasonic Radiation and Chapter 36.Special Senses And Communication Disorders.)


By law, every audiometer in Texas must be calibrated annually by a qualified technician. Calibration is a way of checking sound emitting equipment to make sure that it is performing within set standards.


Minimum standards require a monthly biological calibration. You can do this by checking the threshold of three people with normal hearing, perhaps including yourself. If the audiometer fails this check, it must be corrected by a calibration technician. Audiometer Monthly Biological Calibration Check (Form M-45) [PDF 112KB]


Audiometers on loan. Any hearing screener who is registered in Texas and performs free screenings may borrow an audiometer for 30 to 90 days. A limited number of audiometers are available, so submit your application well in advance of your scheduled screening dates. Loan equipment is especially scarce during the fall semester, when schools conduct hearing screenings.


A loan application form (F05-06832) must be filled out to request an audiometer. The borrower also must fill out a monthly hearing screening report form (AL-16) indicating the number of children screened and submit with the audiometer. View both forms F05-06832 and AL-16. [PDF 509 KB]


The GRAS 90AA Audiometer Calibration System is configured to meet the requirements of modern audio-meter calibration. It is easy and fast to set up and control, and can be upgraded as your calibration needs change. Two standard packages are available and several options can be added, depending on the type and features of the audiometer and respective ear-phones connected.


Use the audiometer independently or with a computer. With one button press, transfer data to GSI Suite to manage records, draft reports, and apply counseling overlays, or use GSI Suite within Noah tp conduct hearing aid fittings.


Comprehensive of a wide range of different models, Inventis audiometers include stand-alone devices as well as computer-controlled units. Screening, diagnostic or clinical, they all feature up-to-date technology and high-end characteristics.


Q. Does the GSI AudioStar Pro require a computer to operate?A. No, the AudioStar Pro can operate as a fully functional, stand-alone audiometer without a computer.


Seamlessly transfer data from the audiometer to a computer. In the event of a network failure or computer lock up, patient data is stored and audiometric testing may be continue without interruption.


Audiometer calibration shall be checked acoustically, at least annually, according to the procedures described in this appendix. The equipment necessary to perform these measurements is a sound level meter, octave-band filter set, and a National Bureau of Standards 9A coupler. In making these measurements, the accuracy of the calibrating equipment shall be sufficient to determine that the audiometer is within the tolerances permitted by American Standard Specification for Audiometers, S3.6-1969.


The current Earscan 3 line of audiometers builds upon the success and features of our original Earscan line of audiometers and middle ear analyzers, the MicroLab industrial audiometer, and the DSP Pure Tone Audiometer.


An audiometer is referred to a complex instrument which helps to measure a person's ability to hear. Various audiometric techniques and procedures are used to identify the hearing ability of a person. 041b061a72


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