Bat Echolocation calls

A collection of bat echo location calls made by bats on Anglesey captured with a Batbox Duet  bat detector and Tascam DR-05 digital recorder. All of the bat echo location recordings are 16-bit 44.1Khz stereo wav files with the left channel recording the FD (Frequency Division) audio and right channel the heterodyne audio output.

If you have any idea what bat species have been recorded please let me know 🙂

The images below are the bat echo location sonograms created by the BatScan software and the full sized image can be downloaded by right clicking on the image and selecting ‘save link as …’

To listen to, and download, the audio wav file just left click on the partial sonogram image this will open a larger sonogram image and the audio file is shown under the larger image.

26th July 2017 – Llanfairynghornwy, Anglesey, UK

3 thoughts on “Bat Echolocation calls”

  1. This is a very helpful site.

    BAT SURVEY TECHNOLOGY
    AN INTRODUCTION
    By Dr.Tina Aughney.

    Full credit, and many thanks to Dr. Tina Aughney for making such a good job of explaining in layman’s language about bats.
    It may help you identify your recordings.

    I am thinking of buying a Batbox Duet and Tascom DR-05 recorder the same as you. I have been reading about people having trouble recording with this set up.
    The problem seems to be the need for the recorder Mic input to act as a line level input.
    Did you use any special leads or settings on the recorder?
    I hope you can help.
    Cheers from Nat.

    1. The Tascam input is geared for mic input levels but the bat detector outputs a line level signal which completely swamps the Tascam even on the lowest input level. I ended up buying an in-line 20dB attenuator from ebay which drops the line level output down to a more reasonable level for the Tascam, it’s not perfect but did work ok. Since then I’ve switched to the Zoom H5 recorder for other projects and it can handle the line input from the bat detector

    2. I ended up using a -25db inline attentuator. I can’t find the one I used but this -35dB attentuator should be fine as even -20dB had the level control almost at zero to avoid clipping. https://www.amazon.co.uk/Movo-MV-RC100-Microphone-Attenuator-Cameras/dp/B01GW69IQ2/ref=pd_lpo_sbs_23_t_0?_encoding=UTF8&psc=1&refRID=QMXERGFFACWT8VT13HAP I’ve recently switched to the Zoom H5 recorder for other projects and it can handle the line input from the bat detector

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