STEM Ecosystem: Plug-N-Play conference and meeting solutions that give you the freedom to create, manage, and scale your collaboration space audio. An easy to use ecosystem of products that provide professional audio in any room.

Part of the Stem Ecosystem for conference rooms, the Shure STEM CEILING1 is an elegant, beamforming microphone array that easily mounts on the ceiling of your conference room. It offers clear and highly intelligible speech capture with state-of-the-art sound quality that enhance the conferencing experience for all participants. The device connects to your local network with PoE+ (Power over Ethernet) or to a computer—in meeting rooms, collaboration areas, and huddle rooms.

Whether you want to keep your audio out of sight or show it off, the Stem Ceiling gives you the option to discreetly flush-mount the microphone to a ceiling tile or tie it into the design of the room in chandelier mode.

The Stem Ceiling features 100 microphones with three array options: wide, medium, and narrow pickup, which you can choose from to configure the device for the size of your room. Full-duplex transmission, voice-activity detection, and automatic tracking of the person speaking ensure intelligible speech capture. Automatic gain control adjusts the volume of people close to and far from the microphones, while echo cancellation, de-reverberation, and background-noise reduction (Audio Fencing) ensure comfortable communication, free from distracting sounds.

The Stem Ceiling is compatible with all your favorite video-conferencing platforms including Zoom, Microsoft Teams, Meet, and others. Since it does not have speakers, it is used for audio capture only.

Simple to Mount and Easy to Set Up

• The Stem Ceiling comes with a square ceiling panel and a mounting kit for easy installation in your conference room.
• Connect the unit to your local network that supports PoE+ (Power over Ethernet). This connection provides the device with power, data, and other IoT and SIP capabilities.
• If your network doesn't support PoE+, you must use a separate PoE+ injector or PoE+ enabled switch (both available separately).
• The unit powers up automatically, and when the blue lights turn solid, you’re ready to go. So, one simple cable is all you need.
• The device can be remotely controlled via the Stem Control device (available separately).

Designed for the Modern Meeting Room

• Visible to all participants in the room, an LED light ring with blue and red colors clearly indicate the status of the unit, so you know when you’re heard and when you’re not.
• Slow-pulsing red lights show that the device is muted and fast-pulsing red lights show that the device is being pinged.
• Slow-pulsing blue lights show that the device is booting up.

Beamforming Technology for Accurate Voice Capture

• The 100 beamforming microphones work together to provide full coverage with a narrow, medium, or wide pickup pattern that can be adjusted for the required coverage area.
• The direction-finding algorithm determines the presence and direction of the person speaking and the beamforming algorithm points the microphone pickup in that direction, ensuring that everyone in the room can be heard clearly by the participants on the far end of the call.

Digital Processing for Clearer Communication

• State-of-the-art auto-echo canceling (AEC), auto-gain control (AGC), noise cancellation, and de-reverberation algorithms enable full-duplex communication and enhance the conferencing experience for all participants.

Audio Fencing

• To prevent office and busy-street noises making their way into your important meetings, Stem Ceiling’s Audio Fencing mode completely removes outside noise and unwanted distractions to keep the focus on what’s important.

Versatile Setup Options

• Using the included Ethernet cable, connect the device to your local network that supports PoE+. 

Standalone Setup with Computer

• If you need video conferencing capabilities, use the included USB Type-B cable to connect the device to your macOS/Windows/Linux computer.
• Note: You must also use a separate PoE+ injector or PoE+ enabled switch to provide power to the unit.

Networked Setup with Multiple Stem Ecosystem Devices in the Room

• Follow the same instruction as with standalone setup with network.
• When setting up multiple Stem devices in a room, you must use a Stem Audio Hub (available separately), as all communications between the devices and the far end are done through the Hub.