Earscan 3 Users Guide Rev1.03

Precautionary Notes: Earscan® 3M Audiometer

1. Use only the factory-supplied, UL approved, power adaptor (wall cube) with the ES3M. Use of any other power adaptor will invalidate the warranty and may result in damage to the audiometer. 2. The ES3M is designed for use with alkaline 1.5 volt AA size batteries. If re-chargeable batteries are used, they must be of the alkaline type. Do not use nickel-metal hydride (NiMH) or nickel cadmium (NiCad) rechargeable batteries. 3. When installing batteries in the ES3M, you must observe the correct polarity. If one or more cells are installed with reversed polarity, the instrument will not operate in the battery-powered mode, and the audiometer may be damaged.

Earscan® is a registered trademark of Micro Audiometrics Corporation. Information in this manual is believed to be accurate; however, Micro Audiometrics Corporation assumes no responsibility for its use. Content is subject to change without notice. No part of this manual may be reproduced without written permission. Copyright © 2006-2007 Micro Audiometrics Corporation. PN: 95.705.103

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Table of Contents Introduction ...5 Basic Operation ...5 The Menu System...6 ES3M Setup ...7 Cable Connections ...7 Power Up ...7 Manual Audiometry ...8 Testing Procedure ...8 Quantifying Hearing Loss...9 Talkover ...9 Audiometry Options ...9 Selecting Frequencies...9 Selecting Levels ...10 Lock or Unlock Settings ...10 Reset Settings...11 Advanced Settings ...11 Power Options ...11 Screen Properties ...12 Adjust Contrast...12 Adjust Brightness ...12 Key Volume ...13 Calibration...13 Technical Specifications ...14 Functional ‘Quick Checks’ ...15 Trouble Shooting...15 External Interface ...16 Connectors ...16 Multi-purpose Connector ...16 Headset Connector ...16 ES3M Information...17 WARRANTY ...18 Contact Information ...19 3

List of Tables TABLE 1. SCALE OF HEARING LOSS... 9 TABLE 2. AC POWER TIMEOUT OPTIONS ... 11 TABLE 3. BATTERY TIMEOUT OPTIONS ... 12

List of Figures FIGURE 1. MANUAL AUDIOMETRY DISPLAY ... 8 FIGURE 2. INFORMATION DISPLAY ... 17

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INTRODUCTION The ES3M is a manual pure tone air conduction audiometer with talkover. It provides manual screening and threshold test capability. The ES3M is an easy to use audiometer with considerable functionality. It is user customizable and can be battery or AC powered. One of the most powerful features of the instrument is the ability to be updated or upgraded via a PC attached to the Internet. Using factory supplied software, firmware updates/upgrades can be downloaded from the Micro Audiometrics website and installed on the ES3M. Micro Audiometrics will be periodically adding new features to the firmware, and these features can be downloaded from the Micro Audiometrics website or obtained from an authorized Micro Audiometrics distributor.

Basic Operation The ES3M audiometer has a yellow keypad/overlay with nine operational keys. The ON key provides a single function; it powers up the audiometer. The MENU key enters the menu system and also navigates ‘upward’ in the menu structure; that is, if you have navigated to a particular menu point, repeatedly pressing the MENU key will return you to the top level menu, and pressing the MENU key while in the top level menu will return you to test mode. The TALK key toggles talkover mode. The remaining keys provide test control when in audiometry mode, and provide menu navigation and selection control when in Menu mode. In this manual, when key presses appear in { }, this means that you should press the indicated key. For example, {Hz▲} means press the Hz▲ key, {L} means press the L key, {MENU} means press the MENU key, etc. ON MENU TALK Hz▲ Hz▼ dB▲ dB▼ L R L+R

– Turn instrument power on. – Enter Menu mode or move “up” in the menu structure. – Enter/exit talkover mode. – Increase frequency or move up in a menu list. – Decrease frequency or move down in a menu list. – Increase level or move up in a menu list. – Decrease level or move down in a menu list. – Present Tone to the Left ear or select a menu item. – Present Tone to the Right ear or select a menu item. – Present Tone to Both ears.

logo key to display the ES3M Information screen. Press any key to Press the exit the information display screen. 5

The Menu System The ES3M default mode is manual audiometry test mode. There are, in addition, a number of user-selectable options that may be accessed via the menu system. For example, the display screen contrast, back light brightness, power-down timeout delays, and key “click” volume may be adjusted through the menu system. Audiometric test defaults, such as starting test level, frequencies to test, and tone presentation mode (pulsed / continuous), may be selected through the menu system. The menu system is designed for intuitive use. Press MENU while in manual audiometry mode to enter the ‘top level’ of the menu system. Once you are in the menu system, {MENU} will move from ‘lower’ to ‘higher’ menu screens; that is, if you have navigated several levels ‘down’ into the menu structure, {MENU} will return you to the next ‘higher’ menu level until the ‘top level’ menu is reached. Pressing {MENU} again will return you to test mode (“Press Menu to Return to Testing” will be displayed at the bottom of the main menu screen). Menu accesses shown in this guide assume that you begin at the ‘top level’ menu. Menu sequences are represented as ⌐MENU1 ⌐MENU2 ⌐MENU3, where the “⌐” symbol is used to indicate “scroll to Menu Item and press the L or R key”. Navigating through menus is done using the {Hz or dB ▲} or {Hz or dB ▼} keys to move up or down through a menu list (highlighted text indicates currently selected item) and then pressing {L} or {R} to make the selection. For example, ⌐Audiometry Setup ⌐Frequencies to Test means that you should enter the menu system by pressing MENU, navigate to Audiometry Setup (e.g, using Hz or dB ▼ key), press the L or R key, navigate to Frequencies to Test and press the L or R key.

Note: You can always return to testing mode by repeatedly pressing {MENU}.

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ES3M SETUP Cable Connections The ES3M audiometer can be powered by 4 AA Alkaline batteries (battery compartment is accessible from the back of the instrument). Optionally, power from an AC adaptor can be supplied via the 6-pin multi-purpose “mini DIN” connector on the top of the instrument. The headset cable plugs into the 15-pin connector on the top of the instrument and is held in place by two screws.

Power Up Press the ON key, and the ES3 logo will appear and a beep will be heard. The instrument will then enter audiometry mode and is ready to begin testing. Note that the instrument’s last calibration date is displayed on the screen at power up (e.g., Last Cal: 02/14/2006).

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MANUAL AUDIOMETRY When the ES3M is in manual audiometry mode, the screen format shown in Figure 1 will be displayed. This display example indicates that the frequency is 1000 Hz and the test level is 20 dB HTL.

Figure 1. Manual Audiometry Display

Hz 1000

Level 20

Testing Procedure 1) Instruct the patient to raise his/her hand whenever a tone is heard. 2) Position the headphones over the patient’s ears (Red over Right ear, Blue over Left ear). 3) Select the test frequency using the {Hz▲} / {Hz▼} keys. 4) Use the {dB▲} / {dB▼} keys to adjust the hearing level and {L} and/or {R} to present the stimulus to Left, Right, or both ears. When testing with Continuous signals, stimulus duration should be about 1 second; the minimum duration allowed is 200 ms. 5) Continue using {dB▲} / {dB▼} and {L / R} to present stimuli consistent with the test paradigm being used (typically Hughson-Westlake) until threshold is determined. 6) Use {Hz▲} / {Hz▼} to select the next frequency to test. 7) Repeat steps 3 through 6 until threshold has been determined for each frequency for the selected test ear. 8) Repeat steps 3 through 7 until threshold has been determined for each frequency for the second ear.

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Quantifying Hearing Loss Table 5 provides a general reference for converting threshold in decibels to degree of hearing loss.

Table 1. Scale of Hearing Loss 0 – 20 dB

Hearing within normal limits

25 – 40 dB

Slight to mild hearing loss

45 – 55 dB

Moderate hearing loss

60 – 70 dB

Moderately severe hearing loss

75 – 90 dB

Severe hearing loss

90 dB+

Profound hearing loss

Talkover Talkover mode may be entered by pressing {TALK} while in audiometric testing mode. There is no specific microphone ‘opening’; sound arrives at the microphone through various openings in the cabinet (e.g., connector cutouts). Talkover volume may be increased using {dB ▲} or {Hz ▲} and decreased using {dB ▼} or {Hz ▼}. It is recommended that a normal speaking voice be used at a distance of 1 to 2 feet while using volume adjustment to compensate for hearing status of the listener. Press {TALK} or {MENU} to exit talkover mode.

Audiometry Options Selecting Frequencies The frequency set to be used for manual testing may be viewed or modified via the menu sequence ⌐AUDIOMETRY SETUP ⌐FREQUENCIES TO TEST. The display will show the list of available test frequencies and there will be a check mark (√) next to the ones currently selected for testing. Use the {Hz or dB ▲} or {Hz or dB ▼} keys to move the highlight to a frequency to select or deselect it for testing, and {L} or {R} to toggle between ‘selected’ and ‘deselected’. Repeat this process as necessary to select or deselect other frequencies. The default frequency set includes 250, 500, 1000, 2000, 3000, 4000, 6000, and 8000 Hz. Once selections are completed, use {MENU} to exit frequency selection mode and return to the menu system. 9

The test starting frequency may be viewed or modified via the menu sequence ⌐AUDIOMETRY SETUP ⌐STARTING FREQUENCY. The display will show the list of available test frequencies and the currently selected starting frequency will be highlighted. Use the {Hz or dB ▲} or {Hz or dB ▼} keys to move the highlight to the desired starting frequency and press {L} or {R} to select the frequency.

Selecting Levels The level set to be used for manual testing may be viewed or modified via the menu sequence ⌐AUDIOMETRY SETUP ⌐LEVELS TO TEST. The display will show the list of available test levels and there will be a check mark (√) next to the ones currently selected for testing. Use the {Hz or dB ▲} or {Hz or dB ▼} keys to move the highlight to a level to select or deselect it for testing, and {L} or {R} to toggle between ‘selected’ and ‘deselected’. Repeat this process as necessary to select or deselect other levels. The default level set includes 10, 20, 30 and 40 dB. Once selections are completed, use {MENU} to exit level selection mode and return to the menu system. The test starting level may be viewed or modified via the menu sequence ⌐AUDIOMETRY SETUP ⌐STARTING LEVEL. The display will show the list of available test levels and the currently selected starting level will be highlighted. Use the {Hz or dB ▲} or {Hz or dB ▼} keys to move the highlight to the desired starting level and press {L} or {R} to select the level.

Lock or Unlock Settings Audiometry setup settings may be “locked” if desired via the menu sequence ⌐AUDIOMETRY SETUP ⌐LOCK SETTINGS. Enter a password and press {L} / {R} to lock all user settings at their current state. Caution! Be sure to record or memorize the password used to lock instrument settings. This password will be required to unlock settings. When audiometry settings are locked, the menu selection will change to Unlock Settings. To unlock settings, enter the menu sequence ⌐AUDIOMETRY SETUP (password) ⌐UnlOCK SETTINGS and enter the password that was used to lock the settings. Advanced Settings may still be changed when Audiometry Settings are locked.

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Reset Settings All user selectable instrument settings may be returned to factory default values via the menu sequence ⌐AUDIOMETRY SETUP ⌐RESET SETTINGS. Calibration data will not be affected. Caution! ‘Reset Settings’ will return all user-selectable settings to factory defaults. User settings that differ from factory defaults will be lost.

ADVANCED SETTINGS Power Options Inactivity timeouts automatically turn off the LCD backlight and power after selectable periods of inactivity to conserve energy and extend battery life (see Table 1; ( ) indicates default setting). Note: The backlight requires considerable battery power. Setting the backlight power-down interval longer than necessary will decrease battery life when the ES3M is battery powered. Individual time-out values may be selected for AC powered and battery powered operation. Table 1 shows the setting options for AC Power, and Table 2 shows the options for Battery power.

Table 2. AC Power Timeout Options (Never) 30 seconds 1 minute 2 minutes 5 minutes Never 1 minute 5 minutes (15 minutes) 30 minutes 1 hour

⌐ADVANCED SETTINGS ⌐A/C POWER SETTINGS ⌐BACKLIGHT

⌐ADVANCED SETTINGS ⌐A/C POWER SETTINGS ⌐POWER DOWN

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Table 3. Battery Timeout Options 5 seconds 10 seconds (20 seconds) 30 seconds 1 minute 15 seconds 30 seconds (1 minute) 2 minutes 5 minutes

⌐ADVANCED SETTINGS ⌐BAT. POWER SETTINGS ⌐BACKLIGHT ⌐ADVANCED SETTINGS ⌐BAT. POWER SETTINGS ⌐POWER DOWN

Screen Properties The LCD Screen is preset at the factory with typical contrast and brightness settings, but both are user adjustable to allow optimizing the display for differing viewing conditions (e.g., ambient lighting or viewing angle). Adjusting either setting may necessitate adjusting the other; e.g., increasing screen brightness may require changing contrast for optimum viewing. The contrast setting has no appreciable effect on battery life, but higher brightness settings require more power and will decrease battery life. Brightness should be set to as low a value as is convenient to preserve battery life.

Adjust Contrast LCD contrast can be adjusted via the menu sequence ⌐ADVANCED SETTINGS ⌐ADJUST CONTRAST. Use {Hz / dB ▲} / {Hz / dB ▼} to adjust contrast to the desired setting. Use {L} / {R} to save the setting, or press {MENU} to exit without changing the contrast setting.

Adjust Brightness LCD brightness can be adjusted via the menu sequence ⌐ADVANCED SETTINGS ⌐ADJUST BRIGHTNESS. Use {Hz / dB ▲} / {Hz / dB ▼} to increase or decrease brightness. Use {L} / {R} to save the setting, or press {MENU} to exit without changing the brightness setting. Note: A brighter backlight requires more battery power. Setting the backlight brightness to a value greater than needed will decrease battery life.

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Key Volume Key presses are silent when in test mode, but produce audible ‘beeps’ when in the menu system. The beep volume can be set via the menu sequence ⌐ADVANCED SETTINGS ⌐KEY VOLUME {Low/Medium/High}.

Calibration The ES3M supports a Telephonics TDH-39 (60 Ω) headset. Special hex screws are used to attach the headset cable to the ES3M. Use of these screws serves as a reminder that headset assemblies should not be casually exchanged, which could invalidate calibration. As a further safeguard, calibration mode is password protected to minimize the risk of inadvertent changes (e.g., while ‘browsing’ through menus). Micro Audiometrics recommends that audiometers be calibrated annually. The last calibration date is displayed in the lower left-hand corner of the logo screen each time the instrument is powered up to serve as a calibration “due date” reminder. Please see the ES3 Calibration Guide for more detailed information regarding headset management and calibration.

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TECHNICAL SPECIFICATIONS ANSI S3.6 Type: Frequencies (Hz): (+/- 1%)

Earphones: Levels (dB HTL):

Presentation: Test Mode:

4 250, 500, 1000, 2000, 3000, 4000, 6000, 8000

TDH-39 (60 Ω) -10 to 80 (+/- 1 dB)

Pulsed or Continuous Manual

Display:

128 x 64 Backlit LCD

Headset:

TDH-39 60 Ω

Power:

4 AA Alkaline Batteries, A/C adapter

Standards Met:

ANSI S3.6-1996, ANSI/AAMI ES1:1993

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FUNCTIONAL ‘QUICK CHECKS’ The following checks can be used to verify instrument operation and to help narrow the focus for solving problems. At power-up the ES3 logo should appear and the backlight should be on. After a short pause, the ES3M should proceed to Audiometry test mode and should respond to keypad control. Keypad operation can be tested by pressing keys and verifying that the appropriate response occurs (e.g., {dB▲} increases level, {Hz▲} increases frequency, etc.). The speaker should produce audible ‘ticks’ when keys are pressed while in the menu system (keys are silent in test mode). Next, check signal generation and keypad control. Select 1000 Hz at maximum output level and press the L or R key. A tone presentation should be heard at a comfortable loudness level at the corresponding earphone. Use {dB▲} / {dB▼} and {L} / {R} to verify that signal loudness increases or decreases, respectively.

TROUBLE SHOOTING Problem ES3M does not power up. Signal is missing or intermittent.

Possible Solution Check batteries or verify that wall cube is attached and plugged in. 1. Verify that headset cable connector is securely attached and mounting screws are snug. 2. Move or gently bend headset cable to see if problem “comes and goes” – if so, there may be a break in the wiring. 3. Verify that screws holding the “fork” connectors at each earphone are snug.

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EXTERNAL INTERFACE Connectors The headset attaches to a high-density 15-pin D-Subminiature connector, and is held in place with allen (hex head) screws to minimize the possibility of accidental mismatch of headset to instrument. All other cables are attached via a multipurpose 6-pin mini DIN connector. The ES3M wall cube or USB cable may be attached to the mini DIN connector. Connector pin outs are as follows:

Multi-purpose Connector 6-pin mini DIN (pin configuration is shown as viewed from back of instrument) Pin

Function

Pin

Function

1

Ground

4

USB D+

2

+5 V In

5

3

6

6

5

4

3 2

USB D-

1

Headset Connector 15-pin high density D-Sub (pin configuration is shown as viewed from back of instrument) Pin

Function

Pin

Function

1

+5 V Out

9

Not Used

2

Lt Phn+

10

Not Used

3

Lt Phn-

11

Ground

4

Rt Phn+

12

Not Used

5

Rt Phn-

13

Not Used

6

Not used

14

Not Used

7

Ground

15

Not Used

8

Not Used

5

4 10

15

16

3 9

14

2 8

13

1 7

12

6 11

ES3M INFORMATION Press the logo key to display the ES3M Information screen. Press it again, or press MENU to exit the information display screen. Serial number and firmware revision are important when upgrades, updates, and/or service are being considered.

Figure 2. Information Display

E a r s c a n 3 M A A N S I S 3 . 6 , T y p e 4 S N : 0 1 0 4 0 2 0 0 0 0 0 1 F i r m w a r e : 1 . 0 0 . 0 0 4 C o p y r i g h t 2 0 0 6 , M i c r o A u d i o m e t r i c s w w w . e a r s c a n . c o m ( 8 6 6 ) E A R - S C A N

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WARRANTY MICRO AUDIOMETRICS CORPORATION LIMITED WARRANTY ES3 PURE TONE AUDIOMETER 1. This is a "LIMITED WARRANTY" as defined in the Consumer Product Warranty and Federal Trade Commission Improvement Act. This WARRANTY gives you specific legal rights and you may also have other rights that vary from state to state. 2. Micro Audiometrics Corporation warrants this ES3 Pure Tone Audiometer to be free from defects in materials and workmanship for three (3) years and headset for one (1) year under normal use. This warranty applies only to the original customer, and only on units purchased and used solely in the United States. Micro Audiometrics Corporation may, at its sole and exclusive option, replace this product. 3. This WARRANTY does not apply to any product damaged by accident, misuse, alteration or abnormal condition of operation, or if the products were altered or repaired by anyone other than Micro Audiometrics Corporation or one of its Authorized Equipment Service Centers. 4. This WARRANTY does not cover cartons, carrying cases, noise reducing enclosures, cables, batteries, broken or marred cabinets, or any other accessories used in connection with the product, or consequential damages due to a defect in the product. 5. This WARRANTY begins on the date of purchase. For your convenience, keep the dated bill of sale or packing list as evidence of the purchase date. 6. In the event of any claim of a defect covered by this warranty, the customer should take the following steps: •

Contact Micro Audiometrics Corporation for Customer Assistance regarding the nature of the claim.

•

The returned audiometer and headset should be re-packed in its original shipping carton, with the audiometer held in place by the plastic film of the retaining panel. If the original shipping carton is not available, choose an appropriate carton with sufficient padding to prevent shipping damage.

•

Return the instrument to the nearest Micro Audiometrics Authorized Equipment Service Center, or to Micro Audiometrics Corporation, 655 Keller Rd, Murphy, NC 28906.

•

The customer is responsible for shipping expenses.

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CONTACT INFORMATION For additional information or assistance, contact your local distributor or contact Micro Audiometrics directly at: Micro Audiometrics Corporation 655 Keller Rd., Murphy, NC 28906 USA Toll-free: (866) EARSCAN 3277226 Voice: (828) 644-0771 Fax: (828) 644-0772

Product and company information is available on the internet: www.earscan.com For product information or inquiries, send email to: [email protected] For product support or technical issues, send email to: [email protected]

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