Products GSI 39

GSI 39 Pure Tone & 

Tympanometry Screener

Overview

The GSI 39 Auto Tymp provides a flexible, screening product for tympanometry, acoustic reflex measurements and audiometry to meet your testing needs today and in the future. It is available in five different versions. Choose the features needed today and upgrade easily to the additional features as your needs grow in the future. These upgrades can be managed in your facility by your local GSI authorized distributor.

Now Compatible with GSI Suite

In addition, each version can also provide the option of 1 kHz testing capability for tympanometry (versions 1 through 5) and tympanometry/reflexes (versions 1 through 4). The addition of 1 kHz allows tympanometry and tympanometry/reflex testing on babies under 6 months of age. This is a helpful tool when isolating the likely cause of a "refer" from a newborn hearing screening program.

The GSI 39 Auto Tymp is lightweight and portable. It is designed to make detection and documentation of middle ear pathologies fast and accurate.

For more information on GSI Suite click here.

Specification

Combo Probe (226 Hz and 1 kHz probe tones)

PROBE TONE: Frequency: 226 Hz +⁄- 2%
Intensity: 85.5 dB SPL +⁄- 2.0 dB; measured with an IEC 60318-5 2 cc coupler
Harmonic Distortion: < 3%
Frequency: 1 kHz Hz +⁄- 2%
Intensity: 75 dB SPL +⁄- 2.0 dB; measured with an IEC 60318-5 2 cc coupler
Harmonic Distortion: < 3%
COMPLIANCE (226 HZ ONLY): Range: 0.0 to 1.5 cm3 and 0.0 to 3.0 cm3
Note: Range is automatically selected based on amplitude of the tymp peak.
Accuracy: +⁄- 5% or +⁄- 0.1 cm3, whichever is greater
ADMITTANCE (1 KHZ ONLY): Range: 0.0 to 5.0 mmho and 0.0 to 10.0 mmho
Note: Range is automatically selected based on amplitude of the tymp peak.
Accuracy: +⁄- 5% or +⁄- 0.3 mmho, whichever is greater
PRESSURE: Range: +200 to -400 daPa
Accuracy: +⁄- 10 daPa or 15%, whichever is greater, measued in 0.5 to 2.0 cc cavities
Sweep Rate: 600 daPa/sec slowing to 200 daPa/sec near tymp peak - 226 Hz only; 200 daPa/sec - 1 kHz only
Sweep Direction: Positive to negative
Gradient: Tymp pressure width at 50% of peak compliance (226 Hz only)
Test Time: Approximately 1 second 226 Hz; approximately 3 seconds 1 kHz
REFLEX (226 HZ PROBE TONE): Frequencies: 500, 1000, 2000, and 4000 Hz
Accuracy: +⁄- 3%
Total Harmonic Distortion: Rise/ Fall Times: 5 to 10 msec
OUTPUT LEVELS (MEASURED WITH A 2CC COUPLER): IPSI
- 500 and 4000 Hz: 80, 90 dB HL, +⁄- 3 dB
- 2000 Hz: 85, 95 dB HL, +⁄- 3 dB
CONTRA
- 500, 2000, 4000 Hz: 90, 100 dB HL, +⁄- 3 dB
Note 1: Stimuli are time multiplexed with the probe tone (62 ms ON, 62 ms OFF);
Note 2: Contra available on versions 2 and 3 only.
Pressure: Automatically set to ambient pressure (0 daPa) for all tests
Determination of Reflex Present: Admittance change of 0.1 mmho or greater
Test Time: 2 to 12 seconds

GSI 39 Probe – 226 Hz Probe Tone only

PROBE TONE: Frequency: 226 Hz +⁄- 2%
Intensity: 85.5 dB SPL +⁄- 2.0 dB; measured with an IEC 60318-5 2 cc coupler
Harmonic Distortion: < 3%
COMPLIANCE: Range: 0.0 to 1.5 cm3 and 0.0 to 3.0 cm3
Note: Range is automatically selected based on amplitude of the tymp peak.
Accuracy: +⁄- 5% or +⁄- 0.1 cm3, whichever is greater
PRESSURE: Range: +200 to -400 daPa
Setting The Clinical Standard
Accuracy: +⁄- 10 daPa or 15%, whichever is greater, measued in 0.5 to 2.0 cc cavities
Sweep Rate: 600 daPa/sec, except near tympanogrm peak where sweep rate slows to 200 daPa/sec to provide better definition of the peak compliance
Sweep Direction: Positive to negative
Gradient: Tymp pressure width at 50% of peak compliance
Test time: Approximately 1 second
REFLEX: Frequencies: 500, 1000, 2000, and 4000 Hz
Accuracy: +⁄- 3%
Total Harmonic Distortion: Rise/ Fall Times: 5 to 10 msec
OUTPUT LEVELS (MEASURED WITH A 2CC COUPLER): IPSI
- 500 and 4000 Hz: 80, 90, 100 dB HL, +⁄- 3 dB
- 1000 and 2000 Hz: 85, 95, 105 dB HL, +⁄- 3 dB
CONTRA
- 500, 1000, 2000, 4000 Hz: 90, 100, 110 dB HL, +⁄- 3 dB
Note 1: Stimuli are time multiplexed with the probe tone (93 ms ON, 66 ms OFF);
Note 2: Contra available on versions 2 and 3 only.
Pressure: Automatically set to pressure at peak compliance with an offset of + or – 20 daPa depending on location of peak compliance
Determination of reflex present: Compliance change of 0.05 cm3 or greater
Test time: 2 to 12 second

Standards

PROBE TONE: ANSI S3.39 1987 Aural Acoustic Impedance/Admittance (Type 3)
IEC 60645-5 (2004) Electroacoustics – Audiological Equipment Part 5 Instruments for Measurement of Aural Acoustic Impedance/ Admittance (Type 2)
ANSI S3.6 (2004) Specifications for Audiometers (Type 4)
IEC 60645-1 (2002) Electroacoustics – Audiological Equipment – Pure Tone Audiometers (Type4)
GL 2005-00014 (ASHA 2005) Guidelines for Manual Pure Tone Threshold Audiometry
ISO 8253-1 (1989) Acoustics- Audiometric test methods
U UL 60601-1 (2003) Medical Electrical Equipment, Part 1 General Requirements for Safety 2nd Edition
CAN/ CSA – C22.2 No. 601.1-M90 (2003) Medical Electrical Equipment, Part 1 General Requirements for Safety, Electrical Equipment for Laboratory Use
IEC/EN 60601-1 Medical Electrical Equipment, Part 1, General Requirements for Safety
IEC/EN 60601-1-4 Medical Electrical Equipment, Part 1, General Requirements for Safety for Programmable Electronic Medical Systems
IEC/EN 60601-1-2 (2001) Medical Electrical Equipment, Part 1, Electromagnetic Compatibility
FREQUENCIES: 125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, and 8000 Hz
Accuracy: +⁄- 2%
Total Harmonic Distortion: < 2.5%
Rise/Fall Time: 20 to 50 msec
PRESSURE: Range: +200 to -400 daPa
Setting The Clinical Standard
Accuracy: +⁄- 10 daPa or 15%, whichever is greater, measued in 0.5 to 2.0 cc cavities
Sweep Rate: 600 daPa/sec, except near tympanogrm peak where sweep rate slows to 200 daPa/sec to provide better definition of the peak compliance
Sweep Direction: Positive to negative
Gradient: Tymp pressure width at 50% of peak compliance
Test time: Approximately 1 second
INTENSITY RANGE: TDH 39 (Standard accessory with versions 3 and 4)
- 125 Hz -10 to 50 dB HL
- 500 to 6000 Hz -10 to 90 dB HL
- 250 and 8000 Hz -10 to 70 dB HL
Note: an additional 10 dB is available for all frequencies with the +10 dB button.
EAR 3A/5A (Optional accessory for versions 3 and 4)
- 125 Hz -10 to 40 dB HL
- 500 to 4000 Hz -10 to 80 dB HL
- 6000 Hz -10 to 70 dB HL
- 250 and 8000 Hz -10 to 60 dB HL
Note: an additional 10 dB is available for all frequencies with the +10 dB button.
Step size: 5 dB
Accuracy:
- 125 to 4000 Hz +⁄- 3 dB
- 6000 to 8000 Hz +⁄- 5 dB
Signal to noise: > 70 dB
TONE PRESENTATION: Continuous: Steady on when Present bar is depressed
Pulsed: 2.5/ sec ( 200 msec ON, 200 msec OFF)
FM (frequency modulated or warble tone): +⁄- 5%, 5 Hz

General

PRINTERS: Internal: 4 inch thermal printer included with all versions
Speed: 2 audiograms + 2 tymp/reflex (4 frequencies), < 1 minute
External: Optional desk jet color printer recognizing PCL3 or PCL3GUI
8 ½" x 11" or A4 format
U Up to 8 Tymp or Tymp/Reflex results per page or up to 8 Audiograms/page
DISPLAY: 240 x 64 graphical, monochrome LCD
POWER SUPPLY AND POWER CONSUMPTION: Universal, auto-ranging power supply: 100 to 240V +⁄- 10%; 50 to 60 Hz +⁄- 5 %; 16 W maximum while printing
ENVIRONMENTAL: Operating Temperature: 59° F to 104° F
Operating Humidity: 15% to 95%
Operating Ambient Pressure Range: 98 kPa to 104 kPa
Storage Temperature: -93° F to +149° F
MECHANICAL: Instrument:
Dimensions: 12.5"(W) x 14.5 "(D) x 4.7"(H);
Weight: 5 lbs - unit and probe
Shipping carton:
Dimensions: 19.5"(W) x 22.5"(D) x 8.25"(H);
Weight: 13.1 lbs
SUPPLIED ACCESSORIES: Probe Assembly ( Standard - 226 Hz only or Combo - 226 Hz and 1 kHz)
Power module + power cord
Test Cavity
Ear tips (probe) 6 sizes, 2 each
Paper – 3 rolls thermal, 4"
User Manual
Quick Reference Guide
Wall Chart – 226 Hz
Ear tips (contra), 8 sizes, 4 ea.; versions 2 and 3
Contra Phone; versions 2 and 3
TDH39 headset; versions 3 and 4
Ear tips (8mm, 25 ea.); Combo probe only
Probe Shoulder Mount; Combo Probe only
Probe Cleaning Kit; Combo Probe only
OPTIONAL ACCESSORIES: Dust Cover . .1738-9620
Carry Case . . .1738-9680
Patch Cord (1 ea.) . .4204-0505
Patient Response Handswitch . . .7874-0156
Audiocups . .8000-0155
COUNTRY KITS:
Order one per instrument at no charge
N. America cord, English . . .1739-9400
N. America cord, Spanish . .1739-9401
N. America cord, Portuguese . . .1739-9402
N. America cord, French . .1739-9403
Europe Cord, French . . .1739-9404
Europe Cord, German . . .1739-9405
Europe Cord, Spanish . . .1739-9406
Europe Cord, Portuguese . .1739-9407
Europe Cord, Russian . . .1739-9408
Europe Cord, English . .1739-9409
UK - Ireland Cord, English . .1739-9410
Italy Cord, Italian . .1739-9411
Italy Cord, Spanish . . .1739-9412
Swiss Cord, German . . .1739-9413
Swiss Cord, French . . .1739-9414
Swiss Cord, English . .1739-9415
Denmark Cord, English . .1739-9416
Israel Cord, English . . .1739-9417
S. Africa Cord, English . .1739-9418
Australia Cord, English . . .1739-9419
Australia Cord, Chinese . .1739-9420
Europe Cord, Korean . . .1739-9421
N. America Cord, Japanese . .1739-9422

Audiogram

Step 1 - Preparing the subject for a test: • Put your subject at ease.
• Make sure the subject understands the task.
• Use the following instructions:
"I am going to place these earphones over your ears. You will hear a variety of tones - some high, some low, some loud, some very soft.
Whenever you hear, or think you hear one of those sounds, raise your hand. Lower your hand when you no longer hear the sound.
Remember that though some of the tones will be easy to hear, others will be very faint. Therefore, you should listen very carefully and raise your
hand whenever you think you hear the tone".
Step 2 - Place Headphone/Insert Ear Phones on patient: 1A: If using Headphones, select on the front panel.
• Eliminate all obstructions between the earphones and subject.
• Place the headband solidly on the crown of the subject's head.
• Center the earphones carefully over both ears.
2B: If using Insert Earphones, select on the front panel.
• Examine the ear canal for obstruction or excessive cerumen.
• Make sure the sound tube is not blocked.
• Insert the black tubing of an ER-3A foam ear tip completely onto the nipple of the sound tube.
• Roll the foam tip into the smallest diameter possible.
• Insert the ear tip well into the ear canal. Interaural attenuation is improved with deep insertion.
• Allow foam to expand to acoustically seal ear canal.
• Discard foam ear tips after a single use.
Step 3 - Conducting the Threshold Test:

Familiarize your subject with the test and determine the start point:
1. Start with the "better" or RIGHT ear.
2. Demonstrate a tone for the subject using 1000 Hz at 40 dB HL.
3. Set the HL control to -10 dB.
4. Hold the present bar down and gradually increase the intensity until a response occurs. Switch the tone off and present it again
in 2 seconds. If the subject responds again, this is the "start" point. If the subject does not respond again, repeat this step.
Determine the threshold:
5. Present the tone 10 dB below the "start" point.
6. Present the tone for 1 or 2 seconds. The time between the tones should vary, but should not be shorter than the test tone.
7. With each response, decrease the tone 10 dB for the next presentation.
8. After each failure to respond, increase the tone 5 dB until the first response occurs.
9. Continue with DOWN 10 dB, UP 5 dB until the threshold is reached.
Threshold = minimum dial setting at which a response has occurred 2 times on an ascending scale.
10. Record the threshold on the audiogram.
NOTE: Repeat steps 5 - 10 for each tone setting in the following order: 1000, 2000, 3000, 4000, 6000, 8000, 1000, 500, 250 Hz.
If there is a difference of 20 dB or more between two successive octaves, test the inter-octave frequencies: 750, 1500, 3000 Hz.