Apply to noise-reducing in tremendous noisy ship engine rooms, it has a unidirectional signal receiver inside.
1. product applification
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Operating voltage: 1.5V |
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Operating current: 3mA |
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Frequency response: 250Hz～8000Hz |
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Receiver power dissipation: 20mW |
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Max receiving volume :85dB |
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SNR:22dB |
2. output speaker
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Speaker type: magnetic speaker |
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Frequency response: 50Hz～12500Hz |
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Nominal impedance/power: 32Ω/0.1W |
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Sensitivity: -95dB ±4dB |
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Specification: Φ27mm |
3. other
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Operating environment: -20℃～65℃ |
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Antenna inductive distance: within 3meters |
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Antenna inductive distance: within 3meters |
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Weight:450g |
◆noise attenuation
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Frequency(Hz) |
250 |
500 |
1000 |
2000 |
3150 |
4000 |
6300 |
8000 |
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Noise-reducing value |
27 |
39.4 |
55.8 |
39 |
47.6 |
44.4 |
44 |
54.4 |
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H=26.8 M=23.1 L=16.3 SNR=22 |
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◆Functional specification
1. paving antenna in ship engine room in advance, put on headset and receive orders from control tower, this headset isolate tremendous noise in engine rooms and help crews fulfill tasks.
2. powered by two pieces 1.5V batteries, easy for replacing. Turn volume knob to switch on electricity and adjust volumes to suit for one’s needs.
3. built-in inductive antenna to receive wireless instructions.
4. headset band is shrinkable, we can adjust it to suit for our needs.
Contact: Gary Lee
Phone: +86-13510034800
Tel: +86-755-88851616
Email: support@npsledlighting.com
Add: ADD: Building C, Huantong Xintian Industrial Zone, No.66 Xinzhang Road, Guanhu Street, Longhua District, Shenzhen,China 518100