With 16,384 virtual microphones and precision speakers, the Dual HDL300 provides true full-room coverage and handles all your audio needs for large meeting rooms, flex spaces, classrooms and more up to 30' x 50' (9.1 x 15.2 m).
Our patented technology fills a room with thousands of virtual microphones so everyone can be heard everywhere in a large space. It also enables unprecedented simplicity, because two easy-to-install microphone and speaker bars give you the coverage and audio performance you need.
Nureva Console
Manage your Dual HDL300 and all your Nureva® audio conferencing systems from anywhere with Nureva Console, our secure cloud-based platform. Check device status, fine-tune audio settings, adjust the microphone pickup zone, activate voice amplification, update firmware and more. You can also access the Nureva Developer Toolkit – cloud-based APIs that let you create integrations for streamlining your workflows.
Integrated microphone and speaker bar
Width: 60.0" (152.4 cm)
Height: 5.91" (14.9 cm)
Depth: 3.5" (9.0 cm)
Weight: 18.0 lb. (8.2 kg)
Connect module
Width: 6.5" (16.5 cm)
Height: 1.41" (3.6 cm)
Depth: 4.31" (10.9 cm)
Weight: 1.5 lb. (0.7 kg)
Shipping (each)
Width: 64.75" (164.4 cm)
Height: 10.63" (27 cm)
Depth: 9.5" (24.1 cm)
Weight: 51.0 lb. (23.1 kg)
Part number
Dual-HDL300-B, black bar
Dual-HDL300-W, white bar
Interface to computer
USB type B 2.0 x1
Auxiliary out
3.5 mm unbalanced stereo jack x1
Auxiliary in
3.5 mm unbalanced stereo jack x1
Connection port
RJ-45 x2
For small spaces up to
18' x 18' | 5.5 x 5.5 m
For mid-size spaces up to
25' x 25' | 7.6 x 7.6 m
Traditional
Traditional beamforming systems employ directional pickup. Microphone pickup is determined by the direction each microphone is aimed. In this case the automatic gain control circuit for each may not be able to determine a talker’s distance from the mic. The system also might not be able to differentiate talkers from other sound sources in a beam such as HVAC or typing. This means desired and undesired sounds get equal treatment. Also, directional pickup systems may need to add more processing to a given signal.
New
The Dual HDL300 system with Microphone Mist technology fills a large space with thousands of virtual microphones that enable the system to know the best sound source locations, which are typically the talkers in the room. This means the system can use position-based gain control (PBGC), which allows it to make specific optimizations to the microphone system while also improving its ability to process each sound source in the room. The result is more natural conversations because the system adjusts each talker’s gain to the optimal level while keeping ambient noises at quieter, more consistent levels.
Traditional
AGC is used in most traditional audio conferencing systems. It keeps the audio output level within a targeted minimum-maximum range by adding gain to the signals from low talkers and reducing gain on the signals from louder talkers. But AGC on a microphone treats the audio signal holistically – it increases the signal from the talker and ambient sounds equally. When it raises the talker’s level, it also raises the level of the ambient noise floor for a less than optimal listening experience.
New
Our Microphone Mist technology listens simultaneously to each of the thousands of virtual microphones it deploys in a room. Each virtual mic is essentially one of the “positions” in PBGC. By knowing the position of each sound source, such as talkers, Microphone Mist technology automatically adjusts the gain so they can be heard clearly, and a more consistent level of ambient noise is maintained. The result is that remote meeting participants experience natural-sounding conversations.
Traditional
Typical conventional systems (especially complicated, in-ceiling installations), use a manual approach, often involving a technician calibrating the echo canceller system to the acoustic properties of a room. A calibration signal (a short tone) is sent through the speaker system and then picked up by the system’s microphones. The acoustic return echo delay is measured, and the data is used to calculate the echo canceller parameters for the system. It can be a time-consuming and intrusive process. The room needs to be taken offline because the space must be quiet during the process. Any changes to the room may also impact echo canceller performance, necessitating an additional manual recalibration of the system.
New
Continuous autocalibration, a proprietary process built into Nureva’s Microphone Mist technology, solves these problems. The system uses a sound mask-like signal to measure the acoustic environment of a room in real time for each microphone and speaker combination. (The signal, if heard at all, is perceived as the background ambient noise common in most commercial environments.) Continuous autocalibration lets the echo canceller automatically deliver consistent performance throughout any call.
Traditional
Traditional approaches to microphone coverage for large spaces, such as beamforming technology, subdivide a room into large zones. If a beamforming array has three zones configured, you get low spatial resolution information. With a small number of large zones to cover, beamforming systems are not able to differentiate between different sound sources within each zone. Its ability to optimize individual sound sources in a zone for the appropriate gain setting, noise filtering and overall audio signal optimization is compromised.
New
The Dual HDL300 system’s Microphone Mist technology fills a room with up to 16,384 virtual microphones that subdivide the space into the same number of spatial bubbles for higher spatial resolution of audio signals. The system can identify and zoom in on individual talkers, giving it the audio information to optimize both acoustic microphone pickup performance and post-processing of the audio signal.
At Nureva, we keep things simple. It’s why installing the Dual HDL300 system is an easy DIY procedure that usually takes less than two hours. Hang the two microphone and speaker bars on the wall (with just two screws and plugs each), run a POE cable to the connect module and then a USB cable to a computer with UC&C software and you’re ready.
