Page 1
2
AT895 Adaptive-array Microphone Systems
Installation and Operation
Note:This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful
interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that
interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio
or television reception, which can be determined by
turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the
following measures:
¥ Reorient or relocate the receiving antenna.
¥ Increase the separation between the equipment and
the receiver.
¥ Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
¥ Consult the dealer or an experienced radio TV
technician for help.
Incorporated in the AT895 design are: DSDA-PRO ªsoftware (U.S. Patent No. 5,825,898) by Lamar Signal Processing, Ltd., a wholly-owned
subsidiary of Andrea Electronics Corporation; DeltaBeam ª(U.S. Patent pending) and MicroLine ¨technologies by Audio-Technica.
ÒDSDA-PROÓ is a trademark of Lamar Signal Processing, Ltd.; ÒDeltaBeamÓ is a trademark of and ÒMicroLineÓ is a registered trademark
of Audio -Technica.
Introduction
Thank you for choosing an AT895 Adaptive-array Microphone
System. AT895 Systems incorporate a revolutionary DSP-
controlled five-element microphone array that provides
adaptive directional audio acquisition.
Utilizing Audio -TechnicaÕs proprietary DeltaBeam
ªtechnology,
the AT895 System manipulates and filters the output of the
array by acoustical, analog and digital means. This process
enhances the pickup of a sound source from a desired
direction relative to unwanted background noise or
interference, providing cancellation of up to 80 dB. Other
benefits include minimized audibility of proximity effect,
minimized nearfield effect on the low-frequency directionality
of the array, and markedly reduced susceptibility to
mechanical noise, wind noise and racking as compared to
currently-available professional microphones.
The AT895 functions equally well for handheld interview use
or long-range sound pickup Ð in the field, in the studio, or in
security operations. Warning:Changes or modifications to this unit
not expressly approved by the party responsible for
compliance could void the userÕs authority to operate
the equipment.
Compare acceptance angles (at 3 dB down):
Microphone 200 Hz 400 Hz 1 kHz 2 kHz 4 kHz 8 kHz
Shotgun 60û 60û 60û 50û 30û 20û
AT895 20û 20û 20û 20û 60û 50û
Compare polar patterns at 200 Hz:
Microphone 200 Hz Rejection at 90û/270û
Shotgun 15 dB
AT895 70 dB
Compare maximum off-axis rejection:
Microphone Maximum Off-axis Rejection
Shotgun 30 dB
AT895 80 dB
AT895 vs. Typical Shotgun Performance
Compared to typical performance of a professional-quality 15.5" line + gradient microphone (measurement conditions: 1Pa
at 0.5 m). Due to the adaptive nature of its digital processing, AT895 performance in actual field conditions will vary with the
environment encountered.
Page 2
Control features on the AT895CP are:
¥ Three-position Mode (pickup pattern) switch which provides
Full-field Adaptive ( ) Planar-adaptive ( ) and
Line + Gradient ( ) settings. (See page 5 for a full
explanation of the Mode settings).
¥ Audio filter switch with Flat, High-pass and Band-pass
settings.
¥ Monitor headphone jack with volume control.
¥ LCD battery condition indicator.
¥ Power switch with LED indicator.
The Basic System
AT895 Microphone
The AT895 Microphone itself is Òall analog,Ó housing one
Audio -Technica MicroLine
¨element, four A-T cardioid
elements mounted in a co-planar diamond configuration, and
five mic preamps. The five amplified analog signals from the
microphone elements are sent individually down a special
detachable cable to the AT895CP Control Pack.
AT895CP Control Pack
The AT895CP Control Pack provides all the power, Digital
Signal Processing, and control for the AT895. Output from
the Control Pack is analog at mic-level (Ð23 dBV).
The lightweight, sturdy metal housing accepts a quick-change,
click-on Battery Housing for totally self-contained operation, if
desired. The Control Pack also operates on external 12-14V
DC Ñ from an Anton/Bauer or similar-type battery source, or
from an AC adapter Ñ via an industry-standard 4-pin XLR-type
connection.
3
No ribs
on ÒTopÓ
and ÒBottomÓ
Ribs
on ÒSidesÓ Model No.
ÒAT895Ó
at ÒTopÓ
Two System Configurations
The AT895 is available as the AT895/RK ÒRemote KitÓ for
field use, and as the AT895/MK ÒMount KitÓ for studio and
fixed-install applications.
AT895/RK Remote Kit includes:
¥ AT895MICAdaptive-array Microphone
¥ AT895CPControl Pack with attached belt clip
¥ AT895BHClick-on Battery Housing
¥ AT895PGPistol-grip shock mount
¥ AT895ZZeppelin-type windscreen
¥ AT895C-10Special 6-conductor shielded Cable, 10' long
¥ AT895CCCarrying Case
AT895/MK Mount Kit includes:
¥ AT895MICAdaptive-array Microphone
¥ AT895CPControl Pack
¥ AT895SCShock-mount Stand Clamp with
5/8"-27
threaded stud
¥ AT895PS1Multi-input AC Power Supply with Ò120VÓ IEC
detachable power cord
¥ AT895C-25Special 6-conductor shielded Cable, 25' long
All components and accessories are interchangeable and
available separately to augment systems or to use as Òfield
spares.Ó In addition, two accessory kits are available:
¥ AT895CKConversion Kit adds the components needed
for an AT895/MK system to function as an
AT895/RK system.
¥ AT895FBKFisher Boom Kit permits use of the AT895 on
a Fisher boom.
(See page 7 for a complete listing of available system
components and accessories.)
The AT895 Microphone and Control Pack are designed to
operate as a system only. Do not attempt to use these
components with other devices.
Fig. A AT895 Microphone
