Ambco 1000+P User manual

Model 1000+ Printer User Manual
AMBCO 1000+P
AUDIOMETER
AMBCO ELECTRONICS
15052 REDHILL AVE SUITE #D • TUSTIN, CA 92780 • [phone] • FAX [phone]
WWW.AMBCO.COM
10-1004, Rev. A DCO 17–008, 11–13–17

Model 1000+ Printer User Manual
Table of Contents
1About the 1000+P Audiometer 3
2Features and Specifications of the Model 1000+P 3
3Setting up the AMBCO Model 1000+P with the Printer 3
4Getting Started – Patient Instructions 4
5Threshold Testing – Establishing Hearing Level at Selected Frequencies 4
6No Response 5
7Recording Results 5
8Manual Test Print–Out 6
9Manual Screening 6
10 Instructing the Patient on How to take the Test Correctly 7
11 Automated Screening Test 7
12 Automatic Threshold Test 8
13 Alarm 8
14 Exiting Auto Test Mode 8
15 Interpreting Results 8
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Model 1000+ Printer – User Manual
1. ABOUT THE 1000+P AUDIOMETER
The AMBCO Model 1000+P is a microprocessor controlled pure tone air conduction
audiometer with automated screening and automated threshold test feature.
2. FEATURES AND SPECIFICATIONS OF THE MODEL 1000+P
Meets performance requirements of ANSI S3.6-1996
OPERATING TEMPERATURE: 15° to 30°C (59°F to 86°F)
PRODUCT TYPE: Pure Tone, Type 4 Audiometer
TEST FREQUENCIES
AUTOMATIC THRESHOLD MODE (HZ): 500, 1000, 2000, 3000, 4000, 6000, 8000 (with
validity check at 1000 Hz)
AUTOMATIC SCREENING MODE (HZ):
TEST 1: 500, 1000, 2000, 4000
TEST 2: 1000, 2000, 3000, 4000
MANUAL MODE: 250, 500, 1000, 2000, 3000, 4000, 6000, 8000
FREQUENCY ACCURACY: Less than 3% – Typically better than 2%
TOTAL HARMONIC DISTORTION: Less than 2.5%, typical 1%
HEARING LEVEL RANGE: 0 to 90 dB in 5 dB increments
POWER SUPPLY: 107-127 VAC 60 Hz, 10 Watts, UL approved (Optional 220
VAC 50/60 Hz available)
AC Adapter Output: 12V DC nominal at 500mA
HEARING LEVEL ACCURACY /Attenuator linearity: ± 1 dB
STIMULUS: Continuous, pulse or warble
Rise/fall time: 20 - 50 ms
DATA OUTPUT: RS-232 9600 Baud, 8 bits, no parity, DTR handshake
EARPHONES: TDH-39 or DD45, 10 OHM
CASE: Injection molded, impact resistant A.B.S. plastic
DIMENSIONS: Width 10 inches, Length 8 inches, Height 4.2 inches
TOTAL WEIGHT: 4.0 Lbs.
WARRANTY: 5 Years on base system
PRINT TIME: Typically less than 20 seconds (printer dependent)
3. SETTING UP THE AMBCO MODEL 1000+P with the Printer
3.1. Connect the printer cable securely to the audiometer and to the printer by
completely tightening all four thumbscrews, two thumbscrews on each end of cable.
Connect the printer AC adapter to the printer and the audiometer AC adapter to the
audiometer recheck to be sure that both adapter plugs are fully inserted into each
jack.
3.2. Locate the red & blue plugs on the cord connected to the headset and the black plug
on the cord connected to the patient response switch. The three plugs need to be
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Model 1000+ Printer – User Manual
connected to the three jacks located on the rear jack panel. Insert the blue plug into
the blue jack, the red plug into the red jack and the black plug into the black jack.
3.3. Turn on the audiometer power switch located on the rear jack panel. The dB and Hz
windows should display visible frequency and decibel numbers.
3.4. Turn on the printer, the power switch is located on left side of printer, move the
switch towards the back to turn printer ‘ON’. The lit green LED located on the left
side of the front panel indicates the printer is on and a second green LED just above
indicates that the printer on line.
4. GETTING STARTED – PATIENT INSTRUCTIONS
4.1. Turn audiometer ON. The power switch is located in the bottom left-hand corner of
the front side of the audiometer.
4.2. Select TONE (Continuous, Pulse or Warble). Press TONE SELECT for choice.
4.3. Test the RIGHT ear first, press EAR for choice.
4.4. Inform the subject that you will place the headset over his/her head and the
receivers will cover the ears. You will present tones, thus the patient shall respond
by using the patient response switch. Make certain the patient understands the
instructions, in that they will respond by pushing and releasing the hand switch as
soon as they CLEARLY HEAR A TONE.
4.5. Adjust the headset, making certain the patient is comfortable. Place the right
receiver (RED) over the right ear and the left receiver (BLUE) over the left ear.
5. THRESHOLD TESTING – ESTABLISHING HEARING LEVEL AT SELECTED
FREQUENCIES
5.1. Follow the steps in Section 4 – Getting Started.
5.2. Present familiarization tone. Set HTL at 40 dB and FREQUENCY at 1000 Hz.
5.3. Press PRESENT TONE (lower center of panel) for 1-2 seconds. RED light above TONE
indicates tone is being presented.
5.4. The patient responds by pressing hand switch. The green light shows a RESPONSE. If
there is no green light, there was no response. SEE ALSO Section 5 - Negative
Response.
5.5. If positive response, proceed with test by setting HTL at 30 dB and selected
frequency, i.e., 500 Hz.
5.6. Press PRESENT TONE for 1-2 seconds.
5.7. Positive response, set HTL at 25 dB, PRESENT TONE, 1-2 seconds.
5.8. Positive response, set HTL at 20 dB, PRESENT TONE, 1-2 seconds.
5.9. Positive response, set HTL at 15 dB, NO RESPONSE.
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Model 1000+ Printer – User Manual
5.10. This indicates the patient’s hearing at 500 Hz in the right ear is 20 dB. The patient
responded to 20 dB, but not to 15 dB.
5.11. Record result per Section 7 – Recording Results.
5.12. Set the HTL at 30 dB and FREQUENCY at next desired level, i.e., 1000 Hz and repeat
Steps 1-11.
TYPICALLY, THRESHOLD TESTS ARE SPECIFIED BY PHYSICIANS. COMMON THRESHOLD
TESTING INCLUDES FREQUENCIES 500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz, 6000
Hz, 8000 Hz. THE STARTING dB LEVEL IS OPTIONAL. IF THERE IS NO RESPONSE AT
ANY BEGINNING FREQUENCY (FIRST TONE PRESENTED AT ANY FREQUENCY),
PROCEED TO SECTION 6 – NO RESPONSE.
6. NO RESPONSE
6.1. NO RESPONSE to familiarization tone or the first tone at any selected frequency.
Proceed with the following instructions.
6.2. Increase the dB level by 10 dB – present the TONE until there is a positive response,
i.e., at 30 dB and 1000 Hz, there is no response.
6.3. Increase HTL to 40 dB, PRESENT TONE, no response.
6.4. Increase HTL to 50 dB, PRESENT TONE, positive response.
6.5. Decrease HTL by 5 dB increments to 45 dB, PRESENT TONE, positive response.
6.6. Decrease HTL to 40 dB, PRESENT TONE, no response.
6.7. Results – Patient hearing at 1000 Hz is 45 dB. Positive response to 45 dB, but not to
40 dB.
7. RECORDING RESULTS
7.1. Using a common pad, Figure 1, you may record the results as in the following
example.
7.2. Write the results above and below the frequencies on bottom of audiogram pad.
7.3. To graph results, frequencies are listed on top of diagram and the HTL dB on right
and left.
7.4. First locate the frequency on top, go straight down where it crosses the dB level, i.e.,
at 500 Hz, left ear dB is 10. Where the 500 Hz crosses the 10 dB line, put an X – it
represents the left ear. The dB is 20 on the right ear, therefore where the 500 Hz line
crosses the 20 dB line, put an O – it represents the right ear.
7.5. Plot all of the results accordingly as shown in the above example, Figure 1.
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Model 1000+ Printer – User Manual
Results R L
500Hz 20dB 10dB
1000Hz 25dB 10dB
2000Hz 30dB 15dB
3000Hz 20dB 10dB
4000Hz 25dB 10dB
6000Hz 20dB 10dB
8000Hz 30dB 30dB
8. MANUAL TEST PRINT-OUT
8.1. For printed manual test results, screening, threshold testing press and hold ‘EAR’
twice (1-2 seconds).
9. MANUAL SCREENING
With the audiometer on and ready, as in Section 4 – Getting Started, follow the following
instructions:
9.1. Select a familiarization dB level, i.e., 40 dB, and then set frequency to 1000 Hz.
9.2. Press PRESENT TONE for 1-2 seconds. Look for patient’s response, either with the
hand switch or a hand signal.
9.3. Select the screening dB HTL, i.e., 25, press PRESENT TONE for 1-2 seconds.
9.4. With every positive response, select the next frequency, i.e., from 1000 to 2000 to
3000 to 4000 Hz and repeat Step 3, testing both the right and left ear.
SCREENING IS PASS OR FAIL. THE RESULTS CAN BE RECORDED AS FOLLOWS:
dB LEVEL
1000
2000
3000
4000
25
1000
2000
3000
4000
Right
Ear
√√√▬ √√√▬
Left
Ear
PASS
√
FAIL ▬
At 25dB the patient failed at 4000Hz both ears
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10. INSTRUCTING THE PATIENT ON HOW TO TAKE THE TEST CORRECTLY
THIS IS THE SINGLE MOST IMPORTANT STEP !!!
10.1. Instruct the patient using the following phrases, “you are about to take a hearing
test, it is not a contest so do not guess, respond only if you are sure you hear a tone
(or set of tones if ‘PULSED’ is being used)” and it’s best to respond during the tone
(or tones).”
10.2. Show the patient the correct way to respond; by pressing once then releasing the
P/R switch to indicate the tone was heard. It is impossible for the instructions to be
repeated to many times; “don’t guess, please remember to respond ONLY when
you’re sure you hear a tone (or set of tones if ‘SELECT TONE’ is set to ‘pulse’) and
that it’s always best to respond during the tone (or set tones if ‘PULSED’ is being
used”.
10.3. Hand the P/R switch to the patient, ask if the patient understands that they must
respond by pressing and releasing the hand switch once. You can have them try the
response button now to see if they understand while you watch to see if the green
response LED on front panel lights up once for each press of the push button.
10.4. Place the headset on the patient’s head with the red earphone over the right ear,
the blue over the left ear, allowing the patient to adjust until the headset is
comfortable.
10.5. You’re now ready to start the test when the patient indicates they are also ready.
10.6. The test begins when the ‘AUTO-TEST’ (‘PRESENT TONE’) touch pad is pressed.
11. AUTOMATED SCREENING TEST
Turn on – follow SECTION 4
Patient instruction – follow SECTION 10
11.1. To give an automated screening test, turn the audiometer on, press the ‘AUTO-TEST’
touch pad. The yellow ‘READY - IN PROGRESS’ LED turns on and the two digital
display windows change. Use the left (dB HTL) knob and window to select the
screening dB level from 10 to 35 dB-HTL. Use the right knob and window to select
which frequencies will be screened. {1000, 2000, 3000, 4000 Hz} or {500, 1000,
2000, 4000 Hz}
11.2. Press ‘SELECT TONE’ to choose between the three types of tones to use;
11.3. Choose either continuous tone pulsed tone or warble tone.
11.4. Press ‘PRESENT TONE’ to start the test, which begins with a 40 dB HTL familiarization
tone before continuing at your set dB level.
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11.5. No response to the familiarization tone causes the alarm to sound, pressing any key
stops the alarm. Then press ‘EAR’ for a print out of the error message, TEST FAILED
AT FAMILIARIZATION TONE.
11.6. If there is a response to the familiarization tone, the test will proceed at the chosen
dB level and the selected frequencies, testing the right ear first, then switches for
the left ear. The screening continues sequentially with each response. If there is NO
RESPONSE at any frequency, the patient is presented the same tone again. If there
is a response to the second presentation, the test continues to the next frequency.
If there is no response to the two tones the print out will show FAILED at that
frequency.
11.7. When the screening is completed, the alarm will sound. PRESS EAR to stop the
alarm and PRESS EAR again to print the results.
12. AUTOMATIC THRESHOLD TEST
Turn on – follow SECTION 4
Patient instruction – follow SECTION 10
12.1. Press ‘AUTO-TEST’ twice, the yellow READY LED and the red POWER LED are lit to
indicate the audiometer is ready for automatic threshold testing.
12.2. Press ‘PRESENT TONE’ to start the test.
12.3. When the test is completed the alarm will sound, press EAR button to stop the alarm
and press ‘EAR’ again for print out.
The completed test print out shows the frequencies tested and the lowest dB
level responded to at each frequency for each ear. NR indicates no response by
the patient.
12.4. To conduct the next automatic threshold test, press ‘AUTO-TEST’ again until the
yellow READY LED and the red POWER LED are lit.
13. ALARM
13.1. Whenever the alarm sounds, before completion of the test, press EAR button to turn
off the alarm and PRESS EAR button again to print the message.
13.2. The print out will indicate the problem and instruct you to resume the test.
14. EXITING AUTO TEST MODE
The operator may exit AUTO-TEST at any time.
14.1. To exit AUTO-TEST MODE, press AUTO-TEST when the green light indicates the
AUTO-TEST MODE is ON.
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14.2. Exit AUTO-TEST after FAIL by pressing AUTO-TEST twice.
15. INTERPRETING RESULTS
The hearing test results are interpreted by qualified persons such as physicians,
audiologists, or nurses.
Numerous factors affect hearing, such as age and background noise. This list below may
be used as a general guideline to compare hearing test results.
AVERAGE THRESHOLD LEVEL (dB)*
00 – 15 dB Normal hearing
16 – 25 dB Slight hearing loss
26 – 40 dB Mild hearing loss
41 – 55 dB Moderate hearing loss
56 – 70 dB Moderately severe hearing loss
71 – 90 dB Severe hearing loss
91+ dB Profound hearing loss
* Generally, if a person can hear as low as 25 dB at the test frequencies, his/her hearing is
considered acceptable.
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