TOA Electronics, Inc.

AM-1 Real-time Steering Array Microphone System
Architect & Engineering Specification

The system shall consist of a microphone, a controller and a power supply.

The microphone shall incorporate eight unidirectional condenser elements 
arranged in a linear array and enclosed in a metal housing of 19” long by 
2.6” deep and .8” high. The microphone case shall house Digital Signal 
Processing which controls the microphone’s sound source sensing and 
directional characteristics. The microphone array shall provide a pickup 
pattern of approximately 50 degrees Horizontal by 90 degrees Vertical 
(from boundary surface to above the mic). The array shall detect any sound 
source in a programmed area of acceptance and steer the pattern immediately 
towards that source based on first arrival of signal. The acceptance angle 
may be adjusted between 180 degrees and any angle down to 30 degrees within 
the 180 degree arc. The microphone shall feature a touch-sensitive MUTE on/off 
button with an LED indicator which shall turn Blue when the microphone is 
active. The microphone shall incorporate a 3 meter shielded twisted-pair cable 
terminated in an XLR male connector. The microphone shall be available 
in either a black or white finish. The microphone may be placed on a lectern 
or table and is equipped with rubber isolation pads to reduce transmission 
of vibration from the mounting surface. The microphone shall be capable of 
being mounted to a wall or ceiling by an optional mounting adapter (WB-AM1BWC AM 
or WB-AM1WWC AM). The microphone shall be the TOA AM-1MB (Black) or AM-1MW (white) 
Array Microphone.

The Controller shall be housed in a metal case measuring 4.1” Wide x 
1.9” High x 8.7” Depth. It shall incorporate additional signal processing 
for the microphone, including Digital to Analog conversion and a 
pre-amplifier. The input to the controller shall be a balanced female 
XLR. The cable distance between the microphone and controller shall 
not be more than 260' using low- capacitance shielded twisted pair 
digital audio cable. A signal present indicator shall light when the 
input signal exceeds -20dB.Electronically balanced analog audio is 
output via a male XLR connector. The analog output shall be capable 
of providing a +4dB professional level, -10 dB consumer level and 
-50 dB microphone level, selectable by a switch on the controller.                     
A volume control on the front panel shall control output level from 
the controller. 24bit AES/EBU digital output via an XLR male connector 
is available for connection to a digital mixer or signal processor. 
An RJ-45 connector shall provide the connection from the controller 
to a PC or wireless Ethernet gateway.  The controller shall have a 
power on/off switch with an LED indicator, as well as an LED MUTE 
status indicator. The system shall be powered by the included power 
supply (TOA model AD-246)
 
The controller shall be the TOA AM-1C Array Microphone Controller.

The System Controller parameters shall be accessible from any PC 
or device using an onboard web browser interface, or through an 
Apple iPad or iPad Mini (available as a free application from the 
Apple App store). System parameters shall include, but not be 
limited to, width and depth of the area of acceptance, distance 
compensation, level, mute on/off, mute disable, and three presets. 
Additionally, the Apple app shall provide real-time control and visual 
feedback of microphone parameters and status.

The AM-1 Real-time Steering Array Microphone System shall be available 
as a complete set. The System shall be the TOA AM-1BSET (black microphone) 
or the AM-1WSET (white microphone).	


Submitted: March, 2016

Apple, iPad, iPad Mini, and the App Store are registered 
trademarks of the Apple Corporation.