Recent wildfires in Maui and California exposed critical communication challenges in disaster response, as damaged infrastructure and difficult conditions disrupted coordination on the ground. In these scenarios, effective response depends not only on transmitting information, but on ensuring it is clearly heard and shared across multiple relief organisations often operating in noisy environments with limited infrastructure. Here, Dave Reeves, international director of business development at Ultralife Corporation, explores the military-grade solutions that can help ensure reliable communication.
Disaster response operations bring together multiple organisations using different systems, often in noisy environments and with limited infrastructure. In these conditions, reliance on relayed communication between individuals can increase the risk of delays or miscommunication. Addressing these challenges requires solutions such as tactical speakers, which help ensure that critical information is consistently delivered and shared across response teams in complex operational environments.
In disaster situations, humanitarian agencies, emergency services, government bodies and military forces must establish cross-organisation communication rapidly in high-pressure environments. The challenge is that each of these organisation types often relies on communication systems and radio networks that were not designed to operate together. For example, military radios may need to connect with civilian and public safety systems such as P25 and TETRA.
Some innovative military-grade speakers can directly connect to standard radio transceivers, enabling compatibility across military and civilian systems without the need for network integration. This supports rapid deployment, reduces operational complexity and allows use across diverse radio platforms in infrastructure-limited environments.
Ensuring clarity in high-noise environments
Alongside the challenge of integrating diverse communication systems, disaster environments are often loud and acoustically complex. Background noise from vehicles, machinery and environmental conditions can make it difficult to clearly understand communications, making clarity and intelligibility just as important as connectivity.
To improve voice communication in the field, Ultralife developed the MRC-67A tactical speaker to operate within a 300–3000 Hz bandpass aligned with the human speech range. Combined with high output levels, this capability helps ensure that messages are not only audible, but clearly understood by personnel working in noisy environments. This reduces the risk of misinterpretation and supports faster, more accurate decision-making in time-critical situations.
Strengthening team-wide situational awareness
Misinterpretation of messages can also occur when radio transmissions are received by a single operator and then relayed to other team members. This limits how widely information is shared and increases the risk of delays or errors.
Tactical speakers can address this by enabling multiple personnel to hear the same transmission simultaneously. For example, by reproducing incoming audio at approximately 90 dBA at one metre, exceeding the typical 80–85 dBA ambient noise levels encountered in active field environments, the MRC-67A ensures messages are clearly heard in the immediate vicinity and reduces reliance on relayed communication.
Maintaining reliable performance in harsh conditions
Beyond clarity and accessibility, communications equipment must also perform reliably in demanding environments. Disaster response operations frequently take place in harsh conditions, including extreme temperatures, high humidity, airborne debris and water exposure. These factors can degrade or disable conventional communication equipment.
Compared with commercially available speakers, tactical models boast a military-grade design suited to demanding environments. For example, the MRC-67A has an operating temperature range of –50°C to +70°C and humidity tolerance of up to 95 per cent, unlike commercial solutions that operate from 0-40°C and up to 60 per cent humidity. Its rugged, sealed construction helps protect against dust, debris and water ingress that can compromise reliable communications and disrupt coordination.
Supporting field-based and infrastructure-limited operations
In addition to environmental challenges, disaster response often takes place away from fixed infrastructure and may be complicated by damaged power systems or overloaded networks. Maintaining communication in these scenarios requires equipment that can operate independently of grid power.
Many tactical speakers support 10–36 VDC input, making them compatible with standard vehicle systems and battery power. This allows them to be deployed directly with teams in the field and continue operating even when electricity infrastructure is unavailable. As a result, communications remain accessible and audible wherever response efforts are taking place.
The communication challenges seen in recent disasters highlight the importance of ensuring that information is reliably delivered and clearly understood across multiple organisations. Even as communication technologies evolve, this requirement remains constant. Interoperability and connectivity are essential, but they must be supported by solutions that ensure messages are clearly heard at the point of delivery.
By making communications audible across teams, maintaining clarity in noisy environments and continuing to operate in extreme conditions without reliance on fixed infrastructure, solutions such as the MRC-67A help ensure critical information is heard, understood and acted upon when it matters most.
To find out more about the MRC-67A amplified speaker, visit the Ultralife Corporation website and download the technical datasheet.
