BHI Ltd

  • 22 Woolven Close
  • Burgess Hill
  • West Sussex
  • United Kingdom
  • RH15 9RR (map)

  • Tel: 01444 870333
  • Website: www.bhi-ltd.com

Contacts

  • Graham Somerville, Managing Director
  •  
  • Number of Employees: 1 - 20

DSP Noise Cancellation Products


DSP Noise Cancellation Products

bhi design and manufacture DSP noise cancellation products that remove unwanted noise and interference from noisy radio and voice communication systems leaving the speech clear and intelligible for you to understand...Don't miss that important message!

Aimed at a number of different radio related and voice communication markets, the products all incorporate unique Digital Signal Processing (DSP) technology to enable clear communications in noisy environments.
Founded in 2002, bhi quickly came to market with their first noise cancellation product, the NES10-2 DSP noise-eliminating speaker. Other products soon followed as bhi rapidly established a worldwide distribution network for their products in over 17 countries. They now have a comprehensive range of DSP noise elimination products and accessories for a wide range of applications and markets. A design service is also available to help customers integrate bhi’s DSP noise cancellation technology into their own products.  Products are manufactured in the UK and overseas under the IS09001 quality standard.

Our Markets
It can be very difficult to understand what is being said when calling or communicating from a noisy environment. bhi’s noise cancellation products will integrate into most voice communication systems to greatly reduce this inherent problem. The products will remove the unwanted background noise and interference, whether it originates from the transmission process, or is picked up from the environment by a microphone. There is a solution to suit most types of radio and voice communications equipment: There are noise elimination speakers that fit into the base station or mobile environment, in-line noise cancelling modules that can be integrated into the communication system, or noise eliminating pcb modules that can be retrofitted internally into existing equipment or designed into new products. The products work just as well in the microphone path, on the transmit side, or in the receive path, and can be used to clean up noisy voice recordings.

Typical Applications

• Emergency services communications
• Covert communications
• Military communications
• Audio restoration and clean-up
• Transport communications
• Hands free kits
• PMR & trunked radio
• Amateur radio
• Commercial HF,VHF,UHF communications
• Marine communications
• Surveillance, CCTV and security
• Intercoms - Medical and Barrier to Gate house
 

DSP Noise Cancelling Speakers


DSP Noise Cancelling Speakers

bhi Ltd manufacture a range of DSP noise cancelling speakers that will remove unwanted noise and interference from noisy voice communications to leave clear speech.  They require 12V DC and simply connect to the extension speaker socket of your radio.  They can be used on any radio from an amateur radio transceiver or receiver to commercial HF and PMR radio.  They can also work with line level inputs and so can be connected to a computer.  Choose from the DESKTOP 10 Watt DSP noise cancellation base station speaker, DSPKR 10 Watt DSP noise cancelling speaker or the compact DSP noise cancelling speaker.

Medical Intercoms


Medical Intercoms

Noisy two-way voice communications a problem?
Can’t hear the person at the other end clearly?
bhi can help….
bhi design and manufacture noise cancelling intercom systems that greatly improve the quality of speech when communicating from within noisy environments. The sounds of machinery, fans, motors, traffic etc. will be removed so that the person can be clearly understood.

The NEIS-RM25 system is particularly useful for improving voice quality in medical treatment applications, especially radiotherapy, where voice communications from the bunker to the control room will be greatly improved. The system consists of a quality robust, stylish desktop control unit with a “push to talk button”, connected to a remote “hands free” speaker unit with a 25ft microphone assembly. Connections are via a single cat 5 data cable.

Suitable applications: Hospital treatment rooms, Mining, Help Points, Transport, Refineries, Factories and buildings, drive thru’s, weigh bridges, car park entry systems, toll booths, door entry etc.

DSP Noise Cancellation PCB Modules


DSP Noise Cancellation PCB Modules

bhi manufacture a range DSP noise cancelling pcb modules suited to commercial applications including "pit to car" radio communcations, covert surveillance, intercoms, CCTV etc. These modules are designed to be fitted into the microphone path or low level audi path on the receive side. 

DSP Noise Cancelling In-Line Modules


DSP Noise Cancelling In-Line Modules

bhi Ltd manufacture a range of DSP Noise Cancelling In-line Modules to connect between your radio and extension speaker or headphones.  They requitre 12V DC and are supplied with all the leads required to get you up and running.  The bhi Compact In-Line is also battery operated and so is very useful for portable operation.

bhi DSP Noise Cancelling Technology


bhi DSP Noise Cancelling Technology

bhi Ltd manufacture a range of DSP noise cancelling speakers that will remove unwanted noise and interference form noisy voice communications to leave speech.  They require 12V DC and simply connect to the extension speaker socket of your radio.  They can be used on any radio from an amateur radio transceiver or receiver to commercial HF and PMR radio.  They can also work with line level inputs and so can be connected to a computer.

How does it work?
Using unique Digital Signal Processing (DSP) technology, the bhi range of DSP noise elimination products remove unwanted background noise and interference from noisy speech signals to leave the processed signal much clearer and intelligible, reducing stress and enabling the user to concentrate more on what is actually being said.
The DSP processes the signal and differentiates the noise from the speech. This unwanted noise and interference is then attenuated to leave only the speech. The DSP technology is fully adaptive and no adjustments are necessary.
The signal is constantly monitored, and the DSP automatically adapts to any changes in the signal conditions.
What can it remove?
Noise can come from two areas
• Transmitting end (picked up by a microphone from within a noisy environment)
• Transmission process (interference) and Transmitting noise source.
This type of noise is picked up by the transmitting microphone and passed along with the speech signal to the destination, for example:
• Road noise
• Engine noise
• Wind noise
• Crowded environments
• Machinery and equipment
• Transmission noise (Interference)
• This type of noise is added to the transmitted signal on route to the destination, for example:
• Poor reception conditions
• Weather
• Other transmitted signals
• Distance.
The bhi range of noise elimination products can remove both of these types of noise without significantly altering the speech signal.
Applications:
• Amateur radio
• HF, VHF, UHF communications
• Marine communications
• Surveillance, security and video
• CCTV
• Emergency services
• Military and covert communications
• Audio restoration
• Transport communications
• Hands free kits

Support resources

Call Applegate +44 (0)345 600 7177 AS