enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Sound is captured from the microphone(s) furthest from the mouth (the noise signal(s)) and from the one closest to the mouth (the desired signal). The signals are processed to cancel the noise from the desired signal, producing improved voice sound quality. In some cases, noise can be controlled by employing active vibration control. This ...

3. Tower Mounted Amplifier - Wikipedia

   en.wikipedia.org/wiki/Tower_Mounted_Amplifier

   A Tower Mounted Amplifier (TMA), or Mast Head Amplifier (MHA), is a low-noise amplifier (LNA) mounted as close as practical to the antenna in mobile masts or base transceiver stations. A TMA reduces the base transceiver station noise figure (NF) and therefore improves its overall sensitivity ; in other words the mobile mast is able to receive ...

4. Noise control - Wikipedia

   en.wikipedia.org/wiki/Noise_control

   Using a combination of sound absorption materials, arrays of microphones and speakers, and a digital processor, a restaurant operator can use a tablet computer to selectively control noise levels at different places in the restaurant: the microphone arrays pick up sound and send it to the digital processor, which controls the speakers to output ...

5. Anechoic chamber - Wikipedia

   en.wikipedia.org/wiki/Anechoic_chamber

   Recently, the term has been extended to other radio frequency (RF) and sonar anechoic chambers, which eliminate reflection and external noise caused by electromagnetic waves. Anechoic chambers range from small compartments the size of household microwave ovens to ones as large as aircraft hangars. The size of the chamber depends on the size of ...

6. Low-noise amplifier - Wikipedia

   en.wikipedia.org/wiki/Low-noise_amplifier

   Antennas are a common source of weak signals. [1] An outdoor antenna is often connected to its receiver by a transmission line called a feed line.Losses in the feed line lower the received signal-to-noise ratio: a feed line loss of 3 dB degrades the receiver signal-to-noise ratio (SNR) by 3 dB.

7. Self-interference cancellation - Wikipedia

   en.wikipedia.org/wiki/Self-interference_cancellation

   Cancelling a local transmit signal requires a combination of analog and digital electronics. The strength of the transmit signal can be modestly reduced before it reaches the receiver by using a circulator (if a shared antenna is used) or antenna isolation techniques (such as cross polarization) if separate antennas are used.