Wildlife Acoustics Bloggers

Sherwood Snyder

Noise logging with the SM2M+ Deep Water and Submersible recorders

Noise logging with the SM2M+ Deep Water and Submersible recorders

Pile drivers, shipping traffic and off-shore oil exploration are just a few of the anthropogenic contributors to an increasingly noisy ocean environment. We can only guess at the effects on marine life when noise levels can exceed 200 dB SPL every 10 seconds. As a result, our SM2M+ Deep Water and Submersible marine recorders are being used not only for recording the sounds of marine life, but also for noise logging. In fact, our products are unique in that they are designed to serve both functions.

With a recording bandwidth of 2hz to 48kHz (or 192kHz for the ultrasonic option), the SM2M+ recorders are perfect for capturing any ocean noise. The recorders log recording levels while making recordings and the log can be quickly converted to actual sound pressure levels (SPL) using the gain and hydrophone sensitivity settings. We provide calibration data with all recorders so as to assure accuracy of the SPL readings. Both ambient and peak measurements are logged.

The SM2M+ recorders also have great battery life, and there are several options to extend deployment. For example, you can employ a recording schedule to stop/start recording at select times. The patented SM2M+ sleep mode makes power consumption negligible in between recordings. Other means to lengthen deployment include Recording Compression or Adaptive Triggering, where the recordings are triggered by crossing a set sound level threshold.

The new Echo Meter EM3+ will be available next week. Preorders are being accepted now.

The new Echo Meter EM3+ will be available next week. Preorders are being accepted now.

I'm pleased to announce that our updated Echo Meter handheld bat detector/recorder will be here by the end of this month.

If you are familiar with the EM3, the new EM3+ keeps all of the powerful features of the original while improving the recording and monitoring quality, “fit and finish” and ergonomics of the recorder. We put considerable effort into these improvements, especially with regards to the look and feel of the device. We worked with a top-rate industrial designer to take our existing button layout and improve usability with new glow-in-the dark graphics. We love the look and think this makes the unit even more intuitive to use. In addition we have added a wrist-strap as that was the number-one most requested feature from our customers. Feel free to trip over roots in the night staring skyward with no fear for your EM3+!

If you are not familiar with the Echo Meter detector/recorder, we had the ambitious design goal of incorporating all the useful features of existing professional detectors and recorders into one handheld-sized device. And succeeded. The EM3+ provides every possible tool to allow you to understand and identify bats in the field.


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