A Comprehensive Guide to Understanding Various Frequency Types (UHF, VHF, 2.4 GHz, and 1.9 GHz) Used in Wireless Audio Transmission Systems for Cameras and Studios

Introduction to Wireless Audio Transmission systems

Wireless Audio Transmission System

Wireless Audio Transmission systems are essential tools for capturing high-quality audio in camera setups, enabling filmmakers and videographers to achieve seamless mobility and flexibility. In this comprehensive guide, we will delve into the four primary frequency types used in wireless audio transmission for cameras:

Additionally, we will review some of the top brands in the industry, including Sennheiser, Audio-Technica, Shure, Hollyland, and Rode, to help you make an informed decision on the right wireless audio system for your specific needs.

UHF (Ultra High Frequency)

UHF wireless audio transmission systems have garnered widespread recognition for their robust performance and reliability. Let’s explore how each of the top brands utilizes UHF technology in their wireless audio systems:

1.1 Sennheiser:

Sennheiser is a renowned name in the audio industry, and its UHF wireless audio transmission systems are no exception. Offering excellent signal stability and interference resistance, Sennheiser’s UHF systems are a top choice for professional video production.

Sennheiser EW 112P G4 Wireless Portable Lavalier Microphone Set
Sennheiser EW 100 G4-ME4 Wireless Lavalier Microphone
Sennheiser EW 100 G4-ME3 Wireless Microphone Set
Sennheiser EW 100 G4-845-S Wireless Microphone System
Sennheiser EW 135P G4 Wireless Microphone
Sennheiser EW 300 G4-HEADMIC1-RC Wireless Headworn System
Sennheiser EW IEM G4 Wireless In-Ear-Monitor-System
Sennheiser AVX-ME2 SET-3 Digital Wireless Audio Microphone System

1.2 Audio-Technica:

Audio-Technica’s UHF wireless audio systems are prized for their outstanding audio fidelity and ease of use. With a wide range of options catering to different budgets and shooting requirements, Audio-Technica remains a popular choice among filmmakers and content creators.

Audio-Technica ATW-2120b Wireless Microphone
Audio-Technica ATW-3212/C510 3000 Series Wireless Systems

1.3 Shure:

Shure has a long-standing reputation for producing high-quality audio equipment, and their UHF wireless audio systems continue to uphold that standard. With advanced features and reliability, Shure’s UHF offerings are a go-to option for professionals in the industry.

VHF (Very High Frequency)

While VHF wireless audio transmission systems are less common in professional applications, some brands still offer VHF options with distinct advantages:

2.1 Audio-Technica:

Apart from their UHF lineup, Audio-Technica also provides budget-friendly VHF wireless systems, making them accessible to consumers with limited financial resources.

2.4 GHz (Wi-Fi)

The 2.4 GHz frequency band is a popular choice for wireless audio transmission, and several brands utilize this technology to create efficient systems:

Audio-Technica System 10 PRO ATW-1322 Digital Wireless System

3.1 Hollyland:

Hollyland’s 2.4 GHz wireless audio transmission systems are known for their reliability and ease of use. They offer stable audio transmission in less congested areas, making them suitable for various shooting scenarios. Some of the Holland Product

Hollyland Lark M1
Hollyland Lark Max
Hollyland Lark 150

1.9 GHz

The 1.9 GHz frequency is gaining popularity for wireless audio transmission, and some brands have embraced this technology: Hollyland is using this frequency for its Wireless intercom system

4.1 Rode:

Some of the popular Rode 2.4GHz Wireless Audio products

Rode Wireless Go
Rode Wireless Go II
RODELink Newsshooter Kit
RODELink Performer Kit

Choosing the Right Wireless Audio System

When deciding on the perfect wireless audio transmission system for your camera setup, consider factors such as the shooting environment, budget, and desired range. While UHF systems generally excel in performance and versatility, the offerings from each brand may differ in terms of features and pricing. Budget-conscious consumers may find VHF and 2.4 GHz systems more accessible, while the cutting-edge 1.9 GHz systems may appeal to those seeking top-tier audio quality.

How to Avoid Frequency Interference in Wireless Audio Transmission: Tips for VHF, UHF, 1.9 GHz, and 2.4 GHz Systems

Frequency interference can be a significant challenge when using wireless audio transmission systems for cameras. It can result in audio dropouts, reduced signal stability, and compromised audio quality, leading to subpar video productions. Whether you are using VHF, UHF, 1.9 GHz, or 2.4 GHz systems, it’s crucial to take proactive steps to avoid interference. In this guide, we will discuss essential tips to minimize frequency interference and ensure smooth and reliable wireless audio transmission.

Choose the Right Frequency Band

Selecting the appropriate frequency band is the first step in preventing interference. Each frequency band has its unique characteristics and susceptibility to interference:

UHF: Ultra High-Frequency systems offer excellent resistance to interference, making them suitable for crowded shooting environments and professional productions.

VHF: Very High-Frequency systems are more prone to interference, especially in urban areas with numerous electronic devices. If possible, consider upgrading to UHF or 1.9 GHz systems.

1.9 GHz: This frequency band is relatively interference-free and provides excellent audio quality. Opt for 1.9 GHz systems when high-quality audio is essential.

2.4 GHz: While widely used for Wi-Fi and other wireless devices, 2.4 GHz systems can suffer from congestion and interference. Use this frequency cautiously, especially in areas with dense Wi-Fi networks.

Scan for Clean Frequencies

Regardless of the frequency type you are using, always scan for clean frequencies before setting up your wireless audio transmission system. Most modern systems come equipped with frequency scanning features that detect and display open channels with minimal interference. Choose the cleanest frequencies available to ensure optimal performance.

Keep Away from Interference Sources

Identify potential sources of interference, such as other electronic devices, Wi-Fi routers, and microwaves. Maintain a safe distance from these sources during your shoot to reduce the risk of interference. Additionally, keep the receiver and transmitter away from large metal objects or surfaces that may block or reflect signals.

Use Diversity Reception

Diversity reception is a technique used in some advanced wireless audio systems that employ multiple antennas. This approach helps to mitigate interference by switching between antennas to use the one with the strongest and clearest signal at any given moment. Consider using diversity receivers to enhance signal stability and minimize dropouts.

Coordinate Frequencies in Multi-Camera Setups

In multi-camera setups, coordinating frequencies between different wireless audio systems is crucial to prevent interference among the devices. Use frequency coordination tools and software to manage and allocate frequencies effectively, especially when working with multiple wireless audio kits on the same shoot.

Monitor Battery Levels

Ensure that the batteries in your wireless audio transmitters and receivers are fully charged. Low battery levels can weaken the signal and increase the susceptibility to interference. Regularly monitor and replace batteries to maintain strong and consistent audio transmission.


Frequency interference can be a significant obstacle in wireless audio transmission for cameras, affecting the overall quality of your video productions. By choosing the right frequency band, scanning for clean channels, avoiding interference sources, utilizing diversity reception, coordinating frequencies in multi-camera setups, and monitoring battery levels, you can minimize interference and achieve reliable and top-notch audio performance with your VHF, UHF, 1.9 GHz, or 2.4 GHz wireless audio systems. Taking these proactive steps will enhance your filming experience and ensure that your audience enjoys impeccable audio to complement your captivating visuals.

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Choose the right Wireless Audio Transmission system for your cameras

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