Echo Meter Touch Bat Detector 4+

Listen to and identify bats‪.‬

Wildlife Acoustics

    • 4.6 • 210 Ratings
    • Free



Using the Echo Meter Touch 2 Pro plug-in module, this app allows you to listen to record and automatically identify bats by their ultrasonic echolocation calls. The module and this companion app reveal the silent and often times invisible world of bats, providing outdoor enthusiasts, citizen scientists, and researchers an affordable and informative way to interact with these important creatures. There are two models: Echo Meter Touch 2 (EMT 2) is intended for nature enthusiasts and batting hobbyists and Echo Meter Touch 2 Pro is designed for bat professionals and features a higher quality microphone, adjustable gain, and higher sample rate.

The Echo Meter Touch Ultrasonic Module senses ultrasonic signals, digitizes the signal, and transmits the ultrasonic data to the app on your iOS device.

EMT2 translates bat echolocations into frequencies that are audible to humans using two technologies. Wildlife Acoustics’ patented Real Time Expansion (RTE) allows you to listen to bats in real time with unparalleled fidelity. RTE maintains the timing and tonality of the original echolocations. Heterodyne (HET) listening via manual and automatic tuning is also available, for those accustomed to that way of hearing bats.

A real-time spectrogram shows the frequencies and timing of the echolocations. Scroll back in time and zoom in on previous "bat passes."

The Auto ID feature analyzes the echolocation calls and suggests the two most likely bat species matches in real time. This is the same technology used in our professional Kaleidoscope Pro Bat Auto Identification software. Currently, the app can identify 26 species in North America, 25 in Europe and 57 in the neotropics. For more information on Kaleidoscope and a full list of species, visit our website.

Activate triggered recording mode to automatically save bat passes to full spectrum .wav files for analysis on a computer or to view on your iDevice. Or use manual record mode to control start and stop of recording. View the recording spectrogram and add voice or text notes. Listen to the recording using RTE, HET, or traditional Time Expansion Playback (playback at fractional speed to make the ultrasound audible).

View in satellite or road map view. View identified species codes directly on the map. Go to the recording's spectrogram from the map view. Transfer to your computer to view in Google Earth. Your iDevice must have GPS capability or you must use a Bluetooth GPS receiver for this functionality.
*Continued use of GPS running in the background can dramatically decrease battery life.*

The EMT 2 can transfer the .wav recordings to your computer over a Wi-Fi network or using a USB cable.

And import and open files that have been shared with you.

***Because bats vary their echolocation calls in response to a wide variety of needs, no automated identification can achieve 100% accuracy in species identification. Auto-ID, though largely accurate, should not be relied on as a basis for scientific research. Auto-ID is intended for use in analyzing recordings of single bats in free flight in low clutter environments. Auto-ID will not work well on recordings of roost emergence, multiple or captive bats, bats in high clutter environments, or bat social calls. Auto-ID does not include every possible bat for each of the covered regions.

What’s New

Version 3.0

Big news! EMT 2 and EMT 2 Pro bat detectors with USB-C or Micro USB connectors are now compatible with iPhones and iPads with USB-C ports. If you own an EMT 2 with USB-C or Micro USB, simply plug the module in to see upgrade instructions. You can then use the EMT 2 with your iOS device (EMT 2 with Micro USB will need an adapter). Wildlife Acoustics will soon begin shipping EMT 2 bat detectors with USB-C with the new firmware already installed and ready to use on any platform.

Ratings and Reviews

4.6 out of 5
210 Ratings

210 Ratings

AlphaZeroOne ,

Opens a door to another world

I have to say that as an amateur naturalist I have been just delighted with this app and the Echo Meter Touch. Combined they allow easy access to the complex world of bats and helps you to start to understanding how very little we generally know about these amazing creatures. To have the ability to not only record the echolocation ‘shouts’ of bats but to also potentially Identify the likely species flying overhead in the dark is amazing. To then be able to play back the sounds and the sonograms for closer analysis is priceless in my book. However, to see the look of surprise and dropped jaws on folks faces when they hear these calls in such detail for the first time, especially youngsters, just goes to demonstrate how powerful this app and the Echo Meter Touch as educational tools and conservation motivators. I have already joined the local bat group and the Bat Conservation Monitor Group as a result of using the app. Here is the perfect vehicle for reinforcing the power and influence of citizen science. I just wish that I could stretch to the pro version.

DEJ77777 ,

Brilliant app and device

I have been using the Echo Meter Touch 2 in a professional capacity and it has performed brilliantly to date. Easy to ID and visualise bat calls on the app and in the field, for a very affordable price too. You will need to amend some of the settings i.e. minimum trigger frequency and sensitivity before using it, otherwise the auto ID function doesn’t work so well and you’ll hear a lot of background noise. I’ve used the app with the iPhone XR, iPad 2017 and iPod Touch and it works smoothly on each. When recording in live mode I find using headphones and locking the screen (it will still record) best practice. Using the speakers and keeping the screen on constantly does drain the battery, especially on an iPod.

WJ197 ,

Excellent kit.

The box of tricks arrived two days before I was due to go on holiday. I had very little time to get acquainted with the app. I need not have worried it worked perfectly. I spent every night close to Bodmin moor (in Cornwall) for a week collecting data with four spices of bat being identified. Can’t wait to get back home to examine the data on my computer. Having built many bat detectors over the years I now have a system that is a quantum leap over anything that went before.

App Privacy

The developer, Wildlife Acoustics, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary based on, for example, the features you use or your age. Learn More

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