Ensure that your Song Meter hydrophones are performing to specifications.

SNational Physical Laboratory

Introducing the Wildlife Acoustics and National Physical Laboratory Song Meter Hydrophone Certification Program

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Specifications

  SM4M Deep Water SM4M Submersible
Working Depth 800 meters 150 meters
Recording Format 16-bit .wav with 16-bits of dynamic range on each channel
for ultrasonic frequencies
16-bit .wav with 16-bits of dynamic range on each channel
for ultrasonic frequencies
Sample Rates Acoustic:
Nine settings between
8,000Hz and 96000Hz
Ultrasonic:
192kHz, 256kHz,
384kHz, 500kHz
Acoustic:
Nine settings between
8,000Hz and 96000Hz
Ultrasonic:
192kHz, 256kHz,
384kHz, 500kHz
Power Accepts up to 64 standard D size disposable alkaline batteries (1.5V) or rechargeable NiMH batteries (1.2V)
A minimum of 4 batteries is required for recorder to function, at least 8 is recommended.
Accepts up to 32 standard D size disposable alkaline batteries (1.5V) or rechargeable NiMH batteries (1.2V)
A minimum of 4 batteries is required for recorder to function, at least 8 is recommended.
Storage Accepts up to 2 SDHC or SDXC cards (class 4 or higher) for storage capacity up to 1 terabyte Accepts up to 2 SDHC or SDXC cards (class 4 or higher) for storage capacity up to 1 terabyte
Dimensions Diameter: 6.5"/16.5 cm
Length: 58.3"/148.0 cm
Diameter: 6.5"/16.5 cm
Length: 31.4"/79.4 cm
Weight Without batteries:
53.8 lb (24.4 kg) in air with 2.2 lb (32.2 kg) of buoyancy in water
With batteries:
71 lb (32.2 kg) in air with -15 lb (-6.8 kg) of buoyancy in water
Without batteries: 20.95 lb (9.5 kg) in air with 12.1 lb (5.5 kg) of buoyancy in water
With batteries: 29.77 lb (13.5 kg) in air with 3.3 lb (1.5 kg) of buoyancy in water
Maximum Deployment Time in Days Note:
Maximum recordable frequency is half of
the sample rate.
Assumptions:
  • All batteries are populated:
    • 32 for Submersible
    • 64 for Deep Water
  • Storage capacity based on two 512 GB cards.
  • Alkaline batteries: NiMH batteries will provide approximately 60% of the longevity.
  • Continuous recording: significantly longer deployment times can be achieved using a duty-cycled schedule.
  • Storage limited times can be extended using W4V compression.
  • Download the free SM4 Configurator for a more accurate estimate of longevity for your specific deployment scenario.
Version Sampling
Rate (Hz)
SM4M
Deep Water
SM4M
Submersible
Acoustic (100% duty-cycle) 8,000 266 133
12,000 266 133
16,000 266 133
22,050 262 133
24,000 241 133
32,000 181 133
44,100 131 131
48,000 121 121
96,000 60 60
Ultrasonic (10% triggered) 192,000 301 153
256,000 226 153
384,000 151 151
Ultrasonic (non-triggered) 192,000 30 30
256,000 23 23
384,000 15 15
Color Code: = Limited by battery capacity
= Limited by storage capacity

Wildlife Acoustics is proud to support wildlife conservation efforts

Merlin Tuttle's Bat Conservation Bat Conservation International Bat Conservation Trust Wildlife Habitat Counsil