WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page FC-1 Portable Screening Audiometer Operating Instructions
WANM-3999-COL AudioScope3 12/18/97 2:34 PM AudioScope® — U.S. Patent No. 4,567,881 AudioSpec® — Patent No.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 1 Contents Warnings ................................................................................ 2 Standards Compliance.......................................................... 3 AudioScope 3 – Introduction................................................ Hearing Loss.................................................................. Traditional Hearing Testing ............................................ 4 4 5 Screening Audiometry ................
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 2 Warnings WARNING: Refer to Owner’s Manual. Use with Welch Allyn Charging Stand (#71123, #71126); Direct Plug-In Chargers (#71040, #71032, #71034, #71036) and/or MicroTymp Printer/Chargers (#71130, #71135, #71170, #71175) only. Use with approved accessories only. Lamp may be hot after use. Use caution during replacement. Not for use in the presence of flammable anesthetics.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 3 Warnings and Standards Compliance Standards Compliance The Model 23300 AudioScope 3 complies with the following standards to the extent that they apply to this instrument: Type BF equipment ANSI S3.6-1969 (R1973): Standard for Audiometers IEC 645-1979: Standard for Audiometers ETL listed: UL2601, CSA C22.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 4 AudioScope 3 – Introduction Thank you for purchasing the AudioScope 3. The operating and maintenance instructions found in this manual should be followed to ensure many years of accurate and reliable service. Please read these instructions thoroughly before using your new AudioScope 3.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 5 TRADITIONAL HEARING TESTING Tuning forks were one of the first methods used to determine the type of hearing loss. They may still be used by some to differentiate between conductive and sensorineural losses. However, they have in great part been replaced by the audiometer. AudioScope 3 – Introduction Traditional audiometers produce pure tones of varying frequency and intensity.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 6 TABLE 1 Audiogram Showing Scale of Hearing Impairment* Frequency in Hz NORMAL Hearing Level (HL) in dB ANSI 1969 MILD MODERATE MODERATELY SEVERE SEVERE PROFOUND *Katz, J. “Handbook of Clinical Audiology,” Williams & Wilkins, 1985.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 7 Screening Audiometry The process of threshold and bone conduction testing can be timeconsuming and costly in terms of equipment and personnel. Such testing should be done in a soundproof room. This is not practical for many people for detection purposes. Therefore, many use a traditional audiometer but conduct a screening audiometric test.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 8 Completing a Test 1. Before starting, check that the lens is centered in the instrument. 2. Select an area that is relatively quiet and free from distracting conversation, fan noises, etc. (see p. 27 for allowable ambient noise specifications). 3. Select a small, medium or large AudioSpec ear speculum. Use the largest speculum that can be inserted comfortably into the ear canal, yet still allow visualization of the tympanic membrane.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 9 5. Instruct the patient that he/she will hear a loud tone (or beep) and then some fainter tones (or beeps). The patient is to respond every time a tone is heard. Responses can be verbal (“yes” or “beep”), gross motor (raising a hand, dropping a block in a bucket, waving a paper towel), or fine motor (raising a finger). Very young children may respond better via a verbal response, whereas seniors seem to perform better via a gross motor response.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 10 of the general findings, it appears that the AudioScope can be used successfully with patients aged 4 years and older; however, care must be exercised to note the level of cooperation among the younger subjects. 2,3,4 6. Retract the patient’s pinna with the thumb and index finger. Gently pull it slightly up and back. With children, the pinna should be pulled back more than up. This facilitates insertion of the tip. 7.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 11 Do not attempt to perform procedures through the AudioScope 3 cavity. This may result in damage to the sound delivery system of AudioScope 3 or inaccurate readings. If the tympanic membrane is significantly occluded by wax, the ear should be cleaned prior to performing the hearing screen. Excessive wax may reduce the hearing sensitivity of a patient. 9. Maintain AudioScope 3 in the same position and depress the “START” button.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 12 Guidelines for Selection of Screening Level 20 DB HL This is a typical screening level for the school-aged child. Although 25 dB HL is regarded as the upper limit for normal hearing2, one would expect the young child’s hearing acuity to be better than that of the adult.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 13 General Protocol Many professional and state guidelines suggest the following: If there is a failure at one or more frequencies in either ear, instruct the patient again and screen again. Failure at one or more frequencies on the second trial constitutes failure on the screen. (See specific instructions above for seniors.) Failure on a second screen indicates the need for further testing.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 14 Lamp and Battery Replacement COVER REMOVAL AND REPLACEMENT If the lamp or battery is to be replaced, it is necessary to first remove the instrument cover: 1. Disconnect the charging transformer from AudioScope 3 and turn the instrument “OFF” before beginning. 2. Insert a coin into the slot of the lock mechanism at the end of the handle. 3.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 15 LAMP REPLACEMENT To remove old lamp: 1. Turn AudioScope 3 “OFF.” 2. LAMP MAY BE HOT—ALLOW TO COOL BEFORE PROCEEDING. 3. Follow instructions for cover removal (page 14). 4. Depress the blue lamp ejector lever (see Figure 1 below). The lamp will pop up. 5. Grasp lamp and remove. Fiber Optic Bundle Beveled end of lamp Lamp ejector lever Figure 1 To insert new lamp: 1.
WANM-3999-COL AudioScope3 12/18/97 2:34 PM Page 16 BATTERY REPLACEMENT Turn AudioScope 3 “OFF”. Remove the cover and lift out the battery. Observe polarity markings when installing new battery. NOTE: Replace with Welch Allyn No. 72300 only. COVER REPLACEMENT The cover may be replaced in the opposite manner in which it was removed: 1. Place the cover over the instrument so that the arrows on the cover and the housing are aligned. 2.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 17 The 3.5v nickel cadmium battery used in this instrument will provide approximately 50 minutes of continuous operation. When the battery is low, the yellow “LO BATT” indicator will illuminate and AudioScope 3 will automatically shut off, thereby preventing incorrect results due to inadequate battery voltage. Viewing illumination will remain on for a period of time after the low battery indicator becomes illuminated.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 18 METHOD 2: USING CHARGING TRANSFORMER 1. Turn AudioScope 3 “OFF”. 2. Plug the charging transformer into a power receptacle of appropriate voltage, frequency and plug configuration (see p. 22). 3. Plug the output cord of the charging transformer into AudioScope 3 charging jack. 4. Place the instrument on its side. AudioScope 3 will not operate while recharging. A fully drained battery can be recharged overnight.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 19 Wall Mounting Instructions 1. Choose a location for the charging stand that is within five feet (1.5m) of an electrical outlet. Wall Mounting Instructions 2. Position mounting bracket vertically on wall and use as a template to pencil markings for drill holes. 3. Select correct mounting hardware: Sheet metal screws and plastic anchors for concrete block or plasterboard — .187" (4.75 mm) diameter drill.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 20 Cleaning and Sterilization CHARGING TRANSFORMERS/CHARGING STAND None of the charging transformers nor charging stand should be sterilized. All may be cleaned by wiping with a dry cloth. Do NOT pour water or any cleaning solution into charging well or specula storage area. AUDIOSCOPE 3 May be cleaned by wiping with a dry cloth or a cloth that has been lightly dampened with 70% Isopropyl Alcohol.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 21 AudioScope 3 Parts and Accessories The following replacement parts are available from your Welch Allyn Distributor: AudioSpecs No. 23303 Small No. 23305 Medium No. 23307 Large AudioScope 3 Parts and Accessories No. 23400 Complete Set (one each of small, medium and large) Battery No. 72300 3.5v Rechargeable Nickel Cadmium Carrying Case No. 05232 Soft Charging Stand No. 71123 Desk or wall mounting Lamp No. 06200 3.5v Halogen Results Forms No.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 22 TRANSFORMERS (CHARGING) Any of the following Welch Allyn charging transformers may be used with this instrument: No. 71040 110-130v Input UL Recognized. CSA Certified No. 71032 220-240v Input Compliant with IEC 601-1 No. 71034 230-250v Input Compliant with IEC 601-1 No. 71036 230-250v Input SAA Approved All transformers operate at either 50 or 60 Hz.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 23 Service, Recalibration and Warranty SERVICE For customers in North America, please return instruments requiring service to a Welch Allyn Technical Service Department listed below or to an authorized Welch Allyn distributor. Technical Service Department Welch Allyn, Inc. 4341 State Street Road Skaneateles Falls, NY 13153-0220 U.S.A. Telephone: 800-669-9771 315-685-4560 Fax: 315-685-4653 Technical Service Department Welch Allyn Canada Ltd.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 24 WARRANTY Welch Allyn, Inc. warrants the AudioScope 3 and the charging stand to be free of original defects in material and workmanship and to perform in accordance with manufacturer’s specifications for a period of one year from the date of purchase.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 25 Technical Specifications AUDIOSCOPE 3 Size/Weight 8.5 in. (21.6 cm) Technical Specifications 1.42 in. (3.61 cm) 1.45 in. (3.68 cm) Weight 9 oz.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 26 Operating Temperature Range: 59° to 95°F (15° to 35°C). All specifications apply over this temperature range. Frequencies: 500, 1000, 2000 and 4000 Hz ±3%. Distortion: Less than 3% total harmonic distortion (as measured at transducer input). Rise/Fall Times: 60 ±40 msec. as measured between the -1 and -20 dB points. Tone Duration: 1.5 ±0.2 sec. Pause Between Tones: Varied: between 1.0 and 2.0 seconds.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 27 Maximum Permissible Ambient Noise for 20 dB HL Screen 55 dB A or 48 dB — 500 Hz octave filter 48 dB — 1000 Hz octave filter 48 dB — 2000 Hz octave filter 48 dB — 4000 Hz octave filter Maximum Permissible Ambient Noise for 25 dB HL Screen and 40 dB HL Screen 60 53 53 53 53 dB dB dB dB dB A or — 500 Hz octave filter — 1000 Hz octave filter — 2000 Hz octave filter — 4000 Hz octave filter Lamp: 3.5v Halogen, 20 hr. average life Battery: 3.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 28 CHARGING TRANSFORMERS Model No. 71040 71032 71034 71036 Wt. A B C 4 oz. 190 gm 190 gm 175 gm 2.2" 70 mm 70 mm 63 mm 2.1" 40 mm 40 mm 43 mm 1.7" 40 mm 40 mm 43 mm CIRCUIT DIAGRAM FOR CHARGING TRANSFORMERS Refer to page 22 for Voltage, Hz, Input and Output for all models.
WANM-3999-COL AudioScope3 12/18/97 2:35 PM Page 30 Welch Allyn, Inc. 4341 State Street Road Skaneateles Falls, NY 13153-0220 (315) 685-4560 or (800) 535-6663 (in U.S.A. only) Fax (315) 685-3361 Part No. 230231-3 Rev. E Printed in the U.S.A.
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