Guide: Choosing The Right bhi DSP Noise Cancelling Speaker

bhi's amplified noise-cancelling speakers utilise advanced Digital Signal Processing (DSP) technology to identify speech signals and remove unwanted background noise and interference to greatly improve speech clarity.

This guide examines our two main amplified DSP speakers, the DESKTOP MKII and the NES10-2 MK4, detailing their specifications, features, and ideal applications to help you select the right speaker for your specific requirements. Note: There is also a third option of installing our pre-wired NEDSP1962-KBD amplified DSP noise cancelling PCB module inside your existing extension speaker, effectively turning it into a DSP noise cancelling speaker.

Got any questions? Contact our team today to discuss your requirements.

bhi technology behind noise cancellation

Our noise cancelling speakers use unique DSP technology that can identify and separate speech from noise in a signal. The noise cancellation systems offer up to 8 filter levels (9 to 40dB), enabling users to select the optimal noise reduction setting for their specific conditions and environment.

Unlike active noise cancellation technology, which works by creating inverse sound waves to cancel out ambient noise, bhi speakers use a different method. Our speakers rely on adaptive DSP filtering in real time, which continuously monitors and analyses incoming audio signals. Instead of generating inverse waves, the technology identifies speech within the signal and selectively suppresses only the unwanted noise elements, leaving just the speech. This approach differs fundamentally in operation and the types of noise it can address effectively compared to active noise cancellation.

The processor handles various noise types effectively, including:

• Constant background hiss
• Static crashes and atmospheric interference
• White noise
• Engine noise
• Wind interference
• Electronic whine
• Crowd noise

DESKTOP MKII speaker features

The DESKTOP MKII is a 10W amplified desktop speaker designed to improve the clarity of radio communications by removing background noise and interference using our DSP technology. It filters out unwanted noise and interference, so speech becomes much easier to hear and is more intelligible.

Physical construction features high-quality ABS plastic with a robust metal grille protecting the separate bass speaker and tweeter elements. The angled design directs sound toward the operator's position, improving intelligibility without increasing volume. Side-panel rotary controls provide easy access to all functions during operation. The DESKTOP MKII includes 8 selectable noise cancellation levels, allowing precise adjustment according to environmental conditions. Audio processing capabilities include:

• 10W audio amplification for clear sound in noisy environments
• Separate volume and filter level controls
• Flexible connectivity options: 4mm speaker terminals, 3.5mm line level input, 3.5mm mono headphone socket
• Dimensions: Size 200(H) x 150(D) x 160(W)mm, weight 1.90Kg

NES10-2 MK4 speaker specifications

The bhi NES10-2 MK4 Amplified DSP Noise Eliminating Speaker is a compact speaker designed to enhance radio audio clarity by removing background noise. It offers the same DSP noise-cancelling performance as the larger DESKTOP MKII but in a smaller design.

The NES10-2 MK4 features top-mounted controls for direct access during operation, with the filter level control on the rear of the speaker. The speaker includes a removable mounting bracket that enables various installation options. This versatility proves particularly valuable in vehicles, boats, or radio shacks where standard speaker placement might not be optimal.

• 5W audio amplifier with adjustable output
• Up to 40dB noise reduction and 65dB tone reduction capability
• Dimensions: W130 mm x D60mm x H75mm
• Function switch for audio bypass, audio on and DSP on
• 8-level filter select switch
• 3.5mm mono headphone socket
• LED indicators for power on/DSP filter on, and input overload

Speaker connectivity options

Audio input options vary by model, with the DESKTOP MKII providing the most comprehensive connections.

For specialised radio equipment integration, we offer numerous audio cables and audio adapters designed specifically for use with popular radio models. For installations requiring additional radio/receiver connections, our Six-Way Switch Box enables the connection of multiple audio sources to a single speaker, as does our Two-Way Mini Switch.

All models accept standard 12V DC input through 2.1mm centre-positive barrel connectors.

Noise cancellation levels comparison

bhi noise-cancelling speakers feature multiple DSP filter levels, allowing users to select the optimal noise reduction setting for specific conditions. The filter level selection system uses a standard scale across all bhi products, with level 1 providing minimal noise reduction and level 8 delivering maximum noise suppression.

Our noise cancellation technology can achieve up to 40dB noise reduction at maximum settings (up to 65dB tone reduction) - equivalent to reducing a loud factory environment to comfortable office noise levels.

Lower filter levels (1-3) provide subtle noise reduction while maintaining the most natural sound quality. These settings work effectively for:

• Radio communication interference
• Environments with minimal background noise
• Situations where audio fidelity remains a priority
• Monitoring multiple audio sources simultaneously
• Applications where distinguishing between similar sounds is critical

Mid-range filter levels (4-6) balance noise reduction with speech preservation. These settings typically provide the best results for:

• Normal office or vehicle environments
• Maritime bridge communications
• Radio communications with moderate interference
• Public address system clarity enhancement

Higher filter levels (7-8) apply aggressive noise reduction for improving signals from challenging environments. These settings excel in:

• High radio interference noise on HF bands and shortwave listening
• Engine rooms and industrial settings
• Emergency services communications during incidents

Marine radio applications

Marine environments present unique challenges for radio communications, where background noise from engines, weather, and equipment can significantly reduce message intelligibility. bhi noise cancelling speakers provide specialised solutions for maritime applications, enhancing safety through improved communication clarity.

The compact NES10-2 MK4 speaker proves particularly valuable in installations where space constraints limit equipment options. Its mounting bracket facilitates secure attachment to console surfaces. For larger spaces with dedicated communication stations, the DESKTOP MKII provides enhanced audio power.

Coast guard organisations have successfully implemented bhi noise cancelling in their communication centres to improve reception from vessels.

Commercial radio implementation

Commercial radio communications systems operate across diverse environments where consistent message clarity directly impacts operational efficiency and safety, especially where signals from high noise environments need to be understood. Our speakers used in a base station application will automatically adapt to these changing environments through their real-time DSP noise cancellation technology.

Commercial applications include:

• Motorsport
• Medical
• Military and surveillance
• Intercoms

Amateur radio station integration

Amateur radio operators face unique audio challenges when communicating across crowded frequency bands filled with interference, static, and overlapping signals. bhi DSP noise-cancelling speakers provide a great noise cancelling solution for ham radio stations, significantly enhancing weak signal reception and reducing operator fatigue during extended operation.

bhi speakers connect easily to virtually any transceiver or receiver, integrating with both modern and vintage equipment.

Take the next step toward crystal-clear communication

Don't let background noise and interference compromise your communications any longer. Experience the remarkable difference bhi DSP noise cancelling speakers can make in improving voice communication from noisy environments. Browse our website today to explore our complete range of DSP speakers, listen to audio demonstrations, and identify the perfect model for your specific needs. Contact us to speak with our team if you’d like a guide through selecting the optimal noise-cancellation solution.