The Stem Ceiling Microphone Array mounts above the conferencing space, providing uncompromising performance while keeping the technology out of sight. With adjustable beam options and the aesthetic look needed to blend with any environment, Stem Ceiling eliminates distractions and keeps the focus on the conversation.

Features

• 100 built-in microphones create a wide, medium, or narrow beam to cover the room or a specific area as needed.
• Audio fencing mode completely removes outside noise and unwanted distractions (available in narrow beam setting only).
• Built-in digital signal processing includes state-of-the-art acoustic echo cancellation, automatic gain control, noise cancellation, and de-reverberation algorithms.
• Automatic configuration and control with Stem Ecosystem platform.
• LED light ring indicates when the device is powered, muted, and other statuses.
• Compatible with leading video conferencing platforms.
• Directly connect the standalone device to a PC via USB or use the Stem Control Touch Controller to integrate a Stem Ecosystem room solution for video conferencing.
• Power over Ethernet (PoE+).
• Dual mounting options: Low profile with square mount or suspended in chandelier mode.

Connector

Type RJ45 and USB Type B

Power Requirements

Power over Ethernet Plus (PoE+) 802.3 at Type 2

Control Application

Stem Ecosystem Platform

Weight

Microphone: 9 lbs (4.1 kg); Square Ceiling Mount: 7.5 lbs (3.4 kg)

Product Dimensions

Microphone: 21.5 x 1.75 in (54.6 x 4.4 cm) D x H at center; H at edge: 0.5 in (1.8cm); Square Ceiling Mount: 23.5 x 23.5 x 1.25 in (59.7 x 59.7 x 3.2 cm) L x W x H; Suspension Cable Length: 120 in (304.8 cm)

Operating Temperature Range

-6.7°C (20°F) to 40°C (104°F)

Storage Temperature Range

-29°C (-20°F) to 74°C (165°F)

AUDIO

Beam Width Narrow

(20 degrees), Medium (45 degrees), Wide (60 degrees)

Frequency Response

50 Hz to 16 kHz

Built-in DSP

Automatic Voice-Level Adjustment (AGC); 100% Full Duplex, no attenuation in either direction

Noise Cancellation

>15dB (without pumping noise)

Acoustic Echo Cancellation

>40dB with conversion speed of 40dB/sec; residual echo is suppressed to the environment noise level, preventing artificial ducking of signal; High-end performance conforms to ITU-T G.167