Viviana Pebble Explained: Solving Body-Block RF in Wireless Microphone Systems

Meet the Viviana Pebble

At Raycom, we’re proud to be the launch partner for Viviana Pebble, a groundbreaking body-worn antenna designed to improve wireless microphone range and reliability when transmitters are worn close to the body.

Designed for film, television, theatre and corporate production, Viviana Pebble addresses one of the most persistent problems in wireless audio: body absorption and body blocking.

With a conventional whip antenna, the human body can detune the antenna and absorb much of the RF energy. Viviana Pebble uses BodyWave technology to guide RF energy away from the body and around it, allowing more signal to reach the receiver.

Why the Viviana Pebble is a game‑changer for wireless audio

Wireless bodypack systems are now ubiquitous in broadcast and live production, but one weak spot remains: antenna placement. When a transmitter sits on the body, skin and clothing absorb RF, detuning whips and choking range. This forces engineers to compromise between aesthetics and signal integrity.

The Viviana Pebble flips that script. By integrating BodyWave technology, it:

• Minimises RF absorption by the body
• Maximises usable range in real‑world conditions
• Reduces the risk of dropouts caused by body blockage
• Fits into many body-worn workflows while improving RF performance in the situations where conventional whips struggle most.
  

Instead of fighting the body’s natural tendency to block RF, the Pebble works with it, turning the human form into part of a more efficient radiating system.

Check out our demo: Introduction and demo of the Viviana Pebble

Check out our introduction video explainer to see Pebble in action. Filmed by Raycom, it shows how Pebble can significantly improve signal strength and reliability when worn on a performer’s body, even in challenging line-of-sight conditions.

Watch the video here:

How BodyWave technology solves body‑worn RF issues

Traditional body‑worn whip antennas are designed assuming a free‑space environment, but once you place a transmitter on a torso, arm, or leg, the body detunes the antenna and absorbs much of the transmitted energy. This is why:

• Actors leaning against walls or walking through doorways lose signal
• Performers moving in complex stage layouts experience inconsistent coverage
• “Hidden” belt‑pack antennas only work in tight, controlled zones

The Viviana Pebble’s BodyWave technology is built around one core idea: guide RF energy around the body instead of trying to punch through it. Inside the Pebble, carefully engineered structures shape the RF field so that:

• More energy escapes the body area
• The effective radiating pattern is less distorted by clothing and movement
• The transmitter sees a more consistent load, so output power stays stable

The result is a body-worn antenna that behaves far less like a compromised whip and gives the wireless system more usable RF margin, especially when the transmitter is close to the body or hidden under costume.

Where the Viviana Pebble performs best

The Viviana Pebble is most effective in scenarios where the body’s interaction with RF is the main limiting factor. These include:

• Open outdoor environments – where there are fewer obstructions beyond the body itself
• Large studios and stages – where talent travels significant distances between cameras or microphones
• Fast‑moving scenes – where actors change orientation and body position frequently
• Complex set layouts – where the body would normally block the antenna path

In testing, this has shown noticeably larger usable range, fewer dropouts and greater confidence when hiding the transmitter on the body.

Equally important, the Pebble was not designed to replace every antenna in every situation. In highly reflective indoor environments (such as small, cluttered rooms) or where the transmitter antenna is already well clear of the body, the improvement may be less dramatic—but the Pebble will still perform reliably and consistently.

Flexible placement tailored to real‑world workflows

One of the Pebble’s strengths is its versatile mounting options. It’s designed to sit comfortably and discreetly on the body while remaining optimally oriented for RF performance.

Common mounting positions include:

• On the torso (front, back, or side)
• On the arm or leg, in a pouch or sock style
• On the head, under a hat, cap, or wig

A key rule is that the side marked “Back” must face the body, with the front kept clear of cables, metallic objects, and other conductive materials that could interfere with the BodyWave pattern. A range of accessories is available to help secure the Pebble in any of these positions, ensuring it stays in place throughout long shoots or performances.

This flexibility makes the Pebble ideal for:

• Costume and concealment‑heavy productions
• Multi‑camera broadcast live events
• Corporate presentations and panel discussions
• Live theatre and immersive experiences

No longer does the RF engineer have to choose between neat concealment and robust signal integrity.

Connectivity and integration with transmitters

A major question raised by RF professionals after Raycom’s early demo video was how the Viviana Pebble connects to existing bodypack transmitters and how it integrates into current wireless systems. The design is deliberately straightforward and practical:

• Connector type: SMA female
• Impedance: Designed as a stable 50 ohm load
• Cable requirement: Use a 50 ohm RF cable between the transmitter and the Pebble
• Adaptor flexibility: The transmitter-side connector can be chosen to match your specific transmitter, such as SMA, SSMA or 1-pin Lemo variants
  

The Pebble does not require any special firmware, or protocol changes; instead, it functions as a high‑performance replacement antenna for your existing bodypack. When connected correctly, the transmitter sees a well‑matched load, allowing it to deliver its intended output power consistently, even when placed close to the body.

This approach brings several advantages:

• Eliminates the performance drift that occurs when traditional whips detune near the body
• Reduces variation between different transmitter models using the same antenna type
• Simplifies system design because you can standardise on a single, high‑performance antenna platform

For users integrating multiple different brands of transmitters (e.g., Sennheiser, Shure, Sony, Wisycom, Zaxcom, etc.), the Pebble can provide a consistent external antenna platform across different transmitter brands.

Working with your existing RF ecosystem

In practical terms, integrating the Viviana Pebble into an existing wireless rig is a matter of:

1. Selecting the correct male‑to‑SMA cable for your transmitter
2. Ensuring your cable quality matches the rest of your RF chain
3. Confirming that your frequency band is within the range printed on the Pebble’s label

The Pebble is not a universal “one‑size‑fits‑all” solution for every band, so it’s important to match the labelled frequency band on your unit to your planned operating frequencies. This ensures optimal radiation efficiency and avoids off‑band performance issues.

Raycom offers a full range of compatible cables and can advise on the best configuration for your specific transmitter families and bands, so you can drop the Pebble into existing workflows with minimal re‑engineering.

Receive‑side optimisation for best results

Because the Pebble’s BodyWave technology produces a signal that is not purely vertical in polarisation—especially after interacting with clothing and reflections—the receive‑side setup plays a crucial role in real‑world performance.

Reflections from walls, ceilings, floors, props, and moving people naturally rotate the polarisation of any transmitted signal. This means a purely vertical receive antenna setup will miss a portion of the arriving energy, especially when the transmitter is moving or partially obstructed.

To maximise reliability, Raycom recommends:

• Dual receive antennas mounted at opposing slant angles (typically around +45° and – 45°)
• Or circularly polarised antennas, such as helical designs

This approach is already standard practice in many broadcast and live‑sound systems, because it:

• Increases the chance of capturing energy regardless of its polarisation
• Reduces dropouts caused by movement, body blocking, or reflections
• Improves overall coverage across the set or venue

These benefits are not unique to the Pebble; they apply to any well‑designed transmit antenna. However, when combined with the Viviana Pebble, the result is a more robust, drop‑out‑resistant body‑worn system that performs consistently even in complex, dynamic environments.

Problems that the Viviana Pebble solves in production

Broadcast and live‑production professionals are already showing strong interest in the Pebble because it addresses several long‑standing RF pain points:

• Body‑worn antenna detuning – The Pebble replaces lossy, body‑detuned whips with a structured radiator that maintains consistent loading.
  
• Hidden belt‑pack compromises – When designers insist on invisible transmitters, the Pebble delivers better range than a tucked‑away whip.
  
• Inconsistent performance across transmitter models – A single, optimised antenna design reduces variability between different brands and models.
  
• RF “black spots” on stage or set – The improved radiating pattern helps energy escape blocked areas, reducing dead zones.
  
• Time‑consuming RF checks – With more predictable performance, engineers can spend less time troubleshooting dropouts and more time focusing on sound quality.

For location shoots, theatre runs, and multi‑day corporate events, the ability to trust a body‑worn transmitter’s range—without constant re‑plotting or mic‑pack adjustments—is a major operational advantage.

Who should be using the Viviana Pebble?

The Viviana Pebble is ideal for:

• Broadcast and outside broadcast (OB) engineers dealing with mobile talent in open spaces
• Cinema and drama production sound teams wanting clean, well‑hidden mics
• Theatre and musical technical managers seeking consistent coverage across large stages
• Corporate AV and event engineers running panels, presenters, and multiple presenters on one set
• Live‑sound mixers managing monitors and in‑ear systems for on‑stage performers

In each case, the Pebble is not a specialist experiment; it’s a practical, drop‑in‑compatible antenna upgrade that addresses the real‑world limitations of body‑worn RF.

Viviana Pebble available to order now at Raycom.co.uk

Available now through Raycom.co.uk as part of its exclusive worldwide launch, the Viviana Pebble is already attracting attention from broadcast and production professionals. Add it to your setup and stay ahead with an innovative solution built for demanding wireless environments.

Visit raycom.co.uk today to:

• Explore the Viviana Pebble.
• Order the compatible cables tailored to your transmitters.

Bring the future of body‑worn RF into your next project—available to order now from raycom.co.uk, for non UK orders please order via Viviana Sound Solutions.

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