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10. Technical Specifications and Limits for E-A-RTONE
®
3A
Impedance: 10 Ohm, 50 Ohm or 300 Ohm
1 kHz Sensitivity: 102.5 dB SPL in DB-0138 (HA-2) coupler
@ 0.1 Volt rms. (10 V)
@ 0.2 Volt rms. (50 V)
103.5 dB SPL in DB-0138 (HA-2) coupler
@ 0.49 Volt rms. (300 V)
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 V)
5.0 Volt rms. (50 V)
13.75 Volt rms. (300 V)
Max. Peak voltage for 1-% duty cycle:
10 Volts (10 Ohm)
20 Volts (50 Ohm)
55 Volts (300 Ohm)
Accessories supplied:
50 disposable E-A-RLINK
®
3A eartips, 50 disposable E-A-RLINK
®
3B eartips, 4 disposable E-A-RLINK
®
3C eartips and 213 cm
cord (7 feet) with left and right 1/4” mono color-coded phono-plugs.
Data supplied: 2cc-coupler frequency response chart on individual units.
11. Reference Equivalent Threshold Sound Pressure Levels (RETSPLS) According to ANSI S3.6-1996
and ISO-389-2:1994
ANSI S3.6 and ISO 389-2 Reference Thresholds
Sound Pressure Levels in dB re. 20 µPa
Frequency in Hz Coupler 2cc DB-0138 Coupler IEC 711 Coupler 2cc HA-1
125 26.0 28.0 26.5
250 14.0 17.5 14.5
500 5.5 9.5 6.0
750 2.0 6.0 2.0
1000 0.0 5.5 0.0
1500 2.0 9.5 0.0
2000 3.0 11.5 2.5
3000 3.5 13.0 2.5
4000 5.5 15.0 0.0
6000 2.0 16.0 -2.5
8000 0.0 15.5 -3.5