Song Meter SM4M User Guide Supplement
2 Setup
Wildlife Acoustics, Inc.
page
9
2.5
Estimating Battery Life
The following table shows approximate recording longevity in days recording
continuously 24 hours a day. Since the recorder uses very little power while
sleeping, longevity for lower duty cycles can be estimated by multiplying the
shown values (50% duty cycle would double the shown values for example).
This assumes 20-degree Celsius water. Battery life varies and this should be
taken as a maximum figure.
Download our free
SM4 Configurator
software application
to see detailed
visual forecasts for remaining battery life and memory card utilization given your
specific recording schedule and configuration.
2.6
Estimating Memory Requirements
Ultrasonic Recording
Generally, ultrasonic recordings will be made utilizing the trigger function so that
the recorder is not constantly recording and quickly using up card space. How
long any given card (s) will last is dependent on ultrasonic activity, so some
Version
Sampling Rate (Hz)
SM4M
Submersible
SM4M
Deep
8,000
133
266
12,000
133
266
16,000
133
266
22,050
133
262
24,000
133
241
32,000
133
181
44,100
131
131
48,000
121
121
96,000
60
60
192,000
153
301
256,000
153
226
384,000
151
151
192,000
30
30
256,000
23
23
384,000
15
15
Maximum Deployment Time in Days
Ultrasonic
(non-triggered)
Acoustic
(100% duty-cycle)
Ultrasonic
(10% triggered)
Limited by battery capacity
Limited by storage capacity
