Specification Sheet

Aviation Headset Instructions
HEADSET OPERATION
HEADSET NOISE ATTENUATION DATA
Specifications
Cautions:
Model SW-100A
1. Rotate the flexible boom overhead to wear
the microphone on either the right or left side
of the head.
2. Rotate the headset volume control (on the
side of the headset opposite the microphone
boom) fully counter-clockwise to the minimum
position. before the headset plug is inserted
into the aircraft or intercom
3. With the headband resting securely on the
top of the head, check that the earseal are
centered over the ears.
4. For best noise cancellation, position the
microphone 0-6 mm from your lips.
5. Insert the microphone plug (PJ068) into
the aircraft or intercom microphone jack.
Insert the earphone plug(PJ055) into the
aircraft or intercom earphone jack.
6. Volume Adjustment Procedure Rotate the
headset volume knob clockwise to a comfort-
able level.
1. Proper Fit: Proper fit is critical to its noise
attenuation effectiveness.
i. Push the headband down until it rests
comfortably on the top of your head. Move
the earcups slightly up or down or from side
to side until you feel Maximum attenuation.
ii. The use of eyeglasses will reduce the
attenuation. Use thin temples on your glasses
to keep noise leakage at a minimum.
2. Use in Impulsive Noise Area
NRR is based on continuous noise, may not
be an accurate indicator of the impulsive
noise such as gunfire. For maximum prote
tion, you can use ear plugs in addition to it.
3. Maintenance and Cleaning In order for
your headset working properly, always
comply the following:
i. Never alter your headset.
ii. If you see a defect such as splits in cups,
seek immediate replacement.
4. Cleaning Instructions
i. Do not immerse in water.
ii. Clean regularly with mild soap water.
Sponge off headpad and earseals, Taking
care to rinse thoroughly.
The noise reduction or attenuation characteris-
tics of communication headsets must be mea-
sured according to an accepted standard
procedure if the characteristics of different
headset are to be compared in a meaningful
way.
The Noise Reduction Rating (NRR) is provided
in accordance with U.S.EPA Regulation 40
CFR Part 211.Subpart B. The Range of Noise
Reduction Rating for Existing Hearing Protec-
tors is approximately 0 to 30. (Higher Numbers
Denote Greater Effectiveness)
Noise Reduction Ratings(NRR):24dB
Headphone
Type:Dynamic (Φ50)
Frequency Response: 100 Hz to 8 kHz
Sensitivity: 95±5 dB SPL (1 kHz, 1 mW input
per earcup side full volume on ear
simulator)
Impedance: 150 ohms (300 ohms each; wired
in parallel)
Rate Input: 100mW
Max. Input: 250mW
Microphone and Amplifier:
Element Type: Noise-canceling electret
Frequency Response: 150Hz to 5 kHz
Operating Voltage (supplied by aircraft):
8-32 Volts DC
Matching Impedance: 150-1000 ohms
Sensitivity: -33±4 dB(Ref: 0dB SPL=20.0uPa
at 1 kHz with 10 Vdc 150 ohms AC
load)
General:
Temperature: Operating: - 20 to 70°C
Cordage:
SW-100A Straight cord from headset to
molded plug,150CM
Intercom Connections:
Earphone Plug：PJ-055 ( .25" Φ6.3 phone
plug)
Microphone Plug：
PJ-068 ( .206" Φ5.2 phone
plug)
Frequency [Hz] 125 250 500 1000 2000
14.3 21.5 27.1 31.8 36
3.3 2.4 1.5 1.6 1.3
Attenuation [dB]
Standard Deviation
Frequency [Hz] 3000 4000 6000 8000
39.5 41.3 39.7 37
2.1 2.1 2.0 1.3
Attenuation [dB]
Standard Deviation