Song Meter SM4BAT FS User Guide
3 Setup and Installation
Wildlife Acoustics, Inc.
page
12
Ultrasonic Directional Horn Attachment for SMM-U1
The cardioid SMM-U2 and omnidirectional SMM-
U1 are ideal for unattended monitoring where the
precise direction of bat activity is not known in
advance. In applications requiring more
directionality, the SMM-U1 microphone can be
adapted for directional sensitivity with the
available directional horn.
The Ultrasonic Directional Horn converts the
SMM-U1 into a highly directional microphone,
while preserving echolocation call quality. The
attachment remains weatherproof at angles up to 45-degrees from horizontal.
3.7
Protecting the Microphone
Weather Protection for SMM-U2
The SMM-U2 is completely weatherproof and needs no additional protection
from the elements. The microphone element is protected by an IP67
(submersible) rated vent. The microphone can be mounted facing straight up or
horizontally and, in either orientation, does not need a windscreen or any other
form of protection.
Weather Protection for SMM-U1
When installed correctly, the SMM-U1 microphone is completely weatherproof.
It features a hydrophobic membrane that is transparent to acoustic or
ultrasound signals. This membrane prevents unpressurized water from entering
the microphone.
The included microphone windscreen should be installed for long-term
deployments in all areas susceptible to heavy wind-driven rain to avoid
permanent damage to the microphone element due to water penetration. For
short-term deployments in dry climates, windscreens are not necessary, but
recommend as a precaution. Windscreens attenuate ultrasound by only a 1-2 dB
when dry, however, when wet they can attenuate by another 3-5 dB until dry
again. Drying time can vary significantly based on temperature, humidity, and
wind conditions, but in as little as ten minutes, a couple dB will have been
regained.
Secure the windscreen to the SMM-U1 microphone with the included C-clip.
Allow an air gap between the windscreen and the microphone as shown.
Summary of Contents for Song Meter SM4BAT FS
Page 59: ...Song Meter SM4BAT FS User Guide 10 Specifications Wildlife Acoustics Inc page 55 ...
Page 61: ...Song Meter SM4BAT FS User Guide 10 Specifications Wildlife Acoustics Inc page 57 ...
Page 63: ...Song Meter SM4BAT FS User Guide 11 Warranty and Disclosures Wildlife Acoustics Inc page 59 ...