This heavy-duty headset lives up to
the demand under extremely high-noise environment in air-piloting
and car-racing. It is best used in manufactory plants as well.
Built of Acrylonitrile Butadiene
Styrene (ABS), the dome of the speaker is hard, durable and
heat-resistant. Layers of sponge filter ensure high passive noise
reduction level (NRR) of 24dB, which means a reduction of the amount
of background noise reaching your ears. The three-layered thick
earpad create a seal around each of your ear from the high noise
environment.
The speakers are connected by a metal
frame which crosses behind your head. Though the sturdy material of
the speakers are a bit weighty, the Velcro taped headstraps with
which you wear the headset relieves much of the weight and provides
adjustable, comfortable wearing experience.
The electret microphone offers
consistent and accurate transmission. It is connected to the headset
with a strong metal frame which helps adjusting it to the most
suitable position while not getting loose.
Here are some of the exceptional
features of the heavy-duty headset:
|
Technical Specifications of Speakers |
|
Passive Noise Reduction Rating |
24dB |
|
Impedance |
8Ω +/- 15% at 1.0v, 800Hz |
|
Resonant Frequency |
200Hz +/- 20% (without baffle) |
|
Output SPL |
99dB +/- 3dB (at 1W Zxis Calculated) |
|
Frequency Response |
15kHz |
|
Rated Frequency Range |
15kHz |
|
Rated Power Input |
0.5W |
|
Max Power Input |
0.6W |
|
Distortion |
5% Max (rated power input 1000Hz) |
|
Load test |
Noise 0.5W in 24 hours |
|
Heat test: |
50+/-2°C and 20-25% R.H. in 5 hours |
|
Humidity test |
40+/-2°C and 90-95% R.H. in 5 hours |
|
Cold test |
-25 °C in 16 hours |
|
Technical Specifications of Microphone: |
|
Sensitivity |
-43dB (f=1kHz, 0dB=1V/Par VS=4.5V, R=1.0kΩ) |
|
Output Impedance |
1.0 kΩ (f=1KHz); |
|
Current Consumption |
500μA (VS=4.5V, RL=1.0KΩ) |
|
Signal to Noise Ratio |
40dB; |
|
Decreasing Voltage |
-3dB (VS=3.0V to 1.5V) |
|
Soldering heat shock |
+/-3dB (350+/-5°C in 3 minutes) |
|
Storage temperature range |
-40°C~+80°C; |
|
Operation temperature range |
-40°C~+70°C; |
|
High temperature test: |
55+/-2°C in 2 hours; |
|
Humidity test |
40+/-2°C and 93+2/-3% R.H. in 48 hours |
|
Low temperature test |
-20+/-3°C; |
|
Vibration test |
frequency range=10~30~10Hz, amplitude=0.55mm; time for each
period=3 min.; total time=30min; frequency range=30~55~30Hz,
amplitude=0.15mm; time for each period=3 min.; total
time=30min. |
