Wildlife Acoustics Blog

Song Meter SM2M+

What's new in the SM3M?

What's new in the SM3M?

Our new SM3M marine recorder is full of improvements on our popular SM2M model.

Wondering what’s changed?Here’s a quick rundown of a few of the features we’ve added to make this our most intuitive and dependable marine recorder and noise logger yet!

Reliability Improvements

  • Heavy duty hydrophone cage offers greater protection
  • Hydrophone waterblock prevents leakage into the device
  • New heavy duty carrying case for the SM3M submersible


  • Easier to program
  • Alerts you when you’ve made a mistake in loading, editing, or running a program
  • Complete control over all internal parameters
  • Automatic set up--simply connect your hydrophone(s), load a program, and press start
  • Status button lets you quickly check usage, battery voltage, and more
  • Metadata embedded in the files and enhanced self diagnostics

Advanced Technology

  • New circuit design
  • Improved battery life
  • Temperature-controlled clock crystal maintains clock accuracy at extreme temperatures
  • Native SDXC support, meaning no re-formatting needed
  • Nap mode allows recorder to improve battery life by up to 50%
  • Record on 2 channels up to 256 kHz or one channel up to 384 kHz
  • ...and more!

If you have any questions about our latest marine recorders, don't hesitate to contact us and we'd be happy to help!

Dolphins respond to their names when called

Dolphins respond to their names when called

About a year ago, scientists found that dolphins in captivity seemed to have ”signature whistles” or names for each other. According to the previous study, dolphins would use a specific whistle to refer to other dolphins. However, a new finding published at the end of July takes it a step further.

Scientists in St Andrews Bay off the coast of Scotland studied the behavior in a group of bottle nosed dolphins. They played the dolphins their own whistle “names” as well as the names of dolphins in their social group and dolphins of unrelated social groups. The actual whistle calls were tuned slightly to mimic a different “voice”. This removed the possibility that the dolphins were merely recognized the call of a familiar dolphin. When the dolphins heard their own name, they whistled it back in recognition and swam towards the sound. When they heard the whistle names of familiar dolphins, they showed a slight response indicative of recognition, and when they heard the names of dolphins they didn’t recognize, they showed no response.

This proves yet again, that we know relatively little about these intelligent creatures. The signature whistles only account for about half of dolphin whistle sounds, leaving plenty of room for research into the possible meaning of other dolphin vocalizations. We are excited to see what scientists find next!

Wildlife Acoustics is proud to support wildlife conservation efforts

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