Node Works Trading (Hong kong) Limited.
| Supply Ability | 1000 pcs per week |
| Delivery Time | 4 weeks |
| Noise | Active Noise canceling |
| Sensitivity | 113dB @1Khz |
| Battery | Embedded battery |
| Brand Name | Node-Works |
| Model Number | Noise Canceling Headphone-NW-002 |
| Place of Origin | China |
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Product Specification
| Supply Ability | 1000 pcs per week | Delivery Time | 4 weeks |
| Noise | Active Noise canceling | Sensitivity | 113dB @1Khz |
| Battery | Embedded battery | Brand Name | Node-Works |
| Model Number | Noise Canceling Headphone-NW-002 | Place of Origin | China |
Noise Canceling Headphone-NW-002 Key Specifications/Features:
High End Noise-canceling Headphone, wide range Frequency response, battery embedded, high sensitivity
| Features | parameters |
| Frequency response | 10-20Khz |
| Impedance | 32ohm |
| Sensitivity | 113dB @1Khz |
| Noise canceling | 35dB max |
| Operating time | 25 hours |
| Headphone Jack | 3.5mm |
| Cable length | 1.2m |
| Charge port | USB |
| Lead time | 4-week |
| FOB port | Shenzhen |
| MOQ | 500pcs |
What's Noise-canceling Headphones?
Noise-cancelling headphones are headphones that reduce unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing.
Noise cancellation makes it possible to listen to music without raising the volume excessively. It can also help a passenger sleep in a noisy vehicle such as an airliner. In the aviation environment, noise-cancelling headphones increase the signal-to-noise ratio significantly more than passive noise attenuating headphones or no headphones, making hearing important information such as safety announcements easier. Noise-cancelling headphones can improve listening enough to completely offset the effect of a distracting concurrent activity.
To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control. They incorporate a microphone that measures ambient sound, generate a waveform that is the exact negative of the ambient sound, and mix it with any audio signal the listener desires.
Most noise-cancelling headsets in the consumer market generate the noise-cancelling waveform in real-time with analogue technology. In contrast, other active noise and vibration control products use soft real-time digital processing.
To prevent higher-frequency noise from reaching the ear, most noise-cancelling headphones depend on soundproofing. Higher-frequency sound has a shorter wavelength, and cancelling this sound would require locating devices to detect and counteract it closer to the listener's eardrum than is currently technically feasible, or would require digital algorithms that would complicate the headphone's electronics.
Noise-cancelling headphones specify the amount of noise they can cancel in terms of decibels. This number may be useful to compare products, but does not tell the whole story, as it does not specify noise reduction at various frequencies.
Drawbacks
Noise-cancelling headphones have the following drawbacks:
a) They typically cost more than regular headphones.
b) Active noise control requires power, usually supplied by a USB port or a battery that must occasionally be replaced or recharged. Without power, some models do not even function as regular headphones.
c) Any battery and additional electronics may increase the size and weight of the headphones compared to regular headphones.
d) The noise-cancelling circuitry may reduce audio quality and add high-frequency hiss, though reducing the noise may result in higher perceived audio quality.
[From wikipedia]
Company Details
Business Type:
Distributor/Wholesaler,Trading Company,Seller
Year Established:
2015
Total Annual:
0.1-1M
Employee Number:
2~10
Ecer Certification：
Active Member
About us: Node Works Trading ltd. is one of China Electronics Wholesale located in Hong Kong. Node Works is founded by persons with more than 10years experience in electronic development industry in 2015, currently, we provide competitive electronic products like Car Dashcam, MP3, M... About us: Node Works Trading ltd. is one of China Electronics Wholesale located in Hong Kong. Node Works is founded by persons with more than 10years experience in electronic development industry in 2015, currently, we provide competitive electronic products like Car Dashcam, MP3, M...
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