E-A-R Auditory Systems E-A-RTONE 5A Скачать руководство пользователя

Страница: 7 / 12

thresholds for the HA-1, HA-2 (DB 0138) and Ear Simulator 2cc couplers. The
Bruel & Kjaer 2cc DB-0138 (HA-2) coupler will simplify the calibration
procedure and is recommended. Reference thresholds for the DB-0138, IEC
711, and HA-1 couplers are presented below.

Should calibration be

performed for an audiometer currently calibrated towards ISO-389, the
reference thresholds in a 2cc DB-0138 coupler should be used. In order to
calibrate the audiometer for direct readings of the hearing thresholds in dBHL
using the reference thresholds, the following procedure is recommended. The
instrumentation required is a Sound Level Meter with an appropriate
condenser microphone calibrated according to the manufacturer’s
specification. To the microphone, a 2cc coupler, e.g., Bruel & Kjaer DB-0138
is attached. The white nylon tube nipple of the E-A-RTONE

5A earphone is

connected directly to the coupler (see illustration). Set the intensity dial on the
audiometer to 70 dBHL and adjust the output from the audiometer to the SPL-
values given for the different test frequencies in the table below. Repeat the
procedure for all available test frequencies, and in case of a dual channel
audiometer, for both channels.

Frequency in Hz

125

250

500

750

1000

1500

2000

3000

4000

6000

8000

Coupler 2cc DB-0138

96.0

84.0

75.5

72.0

70.0

72.0

73.0

73.5

75.5

72.0

70.0

Coupler IEC 711

98.0

87.5

79.5

76.0

75.5

79.5

81.5

83.0

85.0

86.0

85.5

Coupler 2cc HA-1

96.5

84.5

76.0

72.0

70.0

72.5

70.0

67.5

66.5

ANSI S3.6-1996 and ISO 389-2:1994 Calibration Values

E-A-RTONE

Case

Case nipple

DB-0138 nipple

#13 tubing

DB-0138

2cc

coupler

E-A-RTONE

Case

E-A-RLINK

FUNTAK

HA-1 COUPLER

Содержание E-A-RTONE 5A

Страница 1: ...Instructions for the use of Insert Earphones Auditory Systems ...

Страница 2: ...ct coupling also produces much greater sound separation between ears across the test frequency range Clinically that means more instances where the need for masking is eliminated or the level necessary for effective masking is lower Your average testing time will decrease without sacrificing reliability The method of clinical masking you use does not need to be altered Simply substitute the greate...

Страница 3: ...between an insert earphone and a supra aural earphone This instruction booklet is intended to provide information to allow you to perform hearing testing with your audiometer and E A RTONE 5A Insert Earphones with the confidence that test results will be comparable to or in certain instances more reliable than measurements performed with supra aural headphones Most questions regarding the use and ...

Страница 4: ...in extremely small ear canals In these instances the newly available Infant Eartips are appropriate Secure the section of black tubing which protrudes from the E A RLINK eartip to the sound tube nipple protruding from the E A RTONE 5A case Slowly roll the E A RLINK tip into the smallest diameter possible and insert the E A RLINK well into the ear canal see illustrations The case will function as a...

Страница 5: ...ons the expected noise attenuation will typically exceed 30 dB in the frequency region 125 8000 Hz This additional attenuation will improve test reliability in non ideal environments and in most cases allow testing down to 0 dB HL in a background noise level not exceeding 45 dB A The current ANSI Standard ANSI S3 1 1999 Maximum Permissible Ambient Noise Levels MPANLs For Audiometric Test Rooms Tab...

Страница 6: ...insertion of the connected E A RLINK will place the case portion in front of the pinna Always use E A RLINK tips in both ears or block the non test ear with an E A R foam plug 4 Cable Assembly The junction or pod portion of the cable assembly should be supported at or near the patient s mid chest level to relieve tension on the E A RLINK couplers This can be accomplished by attaching the Velcro ba...

Страница 7: ...the microphone a 2cc coupler e g Bruel Kjaer DB 0138 is attached The white nylon tube nipple of the E A RTONE 5A earphone is connected directly to the coupler see illustration Set the intensity dial on the audiometer to 70 dBHL and adjust the output from the audiometer to the SPL values given for the different test frequencies in the table below Repeat the procedure for all available test frequenc...

Страница 8: ... calibrated for a supra aural earphone and the Target SPLs are the audiometer HL setting plus the insert earphone RETSPLs for the particular 2cc coupler used The process will work as well in reverse i e audiometer calibrated for an E A RTONE insert earphone with a supra aural earphone as the secondary transducer as long as the appropriate Target SPLs TDH values are employed Calibrate the audiomete...

Страница 9: ...its for E A RTONE 5A Impedance 10 Ohm or 50 Ohm 1 kHz Sensitivity 102 5 dB SPL in DB 0138 HA 2 coupler 0 1 Volt rms 10 Ohm 0 2 Volt rms 50 Ohm Limits 3 dB Distortion 3 measured 500 Hz 118 5 dB SPL Maximum output Meets or exceeds 110 dBHL at standard audiometric frequencies between 500 and 4000 Hz Safe operating limits Max continuous sine wave drive 2 5 Volt rms 10 Ohm 5 0 Volt rms 50 Ohm Max Peak ...

Страница 10: ... s of the product original date of purchase and the nature of the problem Merchandise not returned prepaid will be refused Mailing at the time of purchase a completed Warranty Card that is included with each E A RTONE Insert Earphone will facilitate our ability to return repaired units as quickly as possible Warranty service will vary depending on the availability of parts and the workload There w...

Страница 11: ...rticular purpose and merchantability and there are no warranties that extend beyond the description or duration of this warranty No representative agent dealer or employee of Aearo Company is authorized to give any other warranty or to assume for Aearo Company any other liability in connection with sale or service of the products covered by this limited warranty In order for Auditory Systems to pr...

Страница 12: ...free from the US only 800 624 5955 Fax 877 807 7113 International Customer Service Ph 317 656 5713 Fax 317 656 5760 Technical Support Ph 317 692 6550 Fax 317 692 6604 2000 Aearo Company Auditory Systems E A R E A RTONE and E A RLINK are all registered trademarks of Aearo Company 018 9013 ...

Результаты поиска

Содержание E-A-RTONE 5A

Отзывы:

Похожие инструкции для E-A-RTONE 5A

Бренды по названию

Популярные бренды

E-A-R Auditory Systems E-A-RTONE 5A, Инструкция по использованию

Результаты поиска

Содержание E-A-RTONE 5A

Отзывы:

Похожие инструкции для E-A-RTONE 5A

Бренды по названию

Популярные бренды