Tuesday, January 24, 2012

Review: EM3 From Wildlife Acoustics Part 1 Of 2

Review: The EM3 From Wildlife Acoustics (Part 1 Of 2) - Some preliminary thoughts, and first impressions -Well, it's finally here! The long-anticipated, new Echo Meter 3 from Wildlife Acoustics, Inc. is now available! I must state, first and foremost: That this new bat detector is revolutionary. It is the first hand-held, ultrasonic detector to feature a (live) sonogram display!
I envision this feature being very welcomed by experienced hobbyists and Bat Workers/Researchers.
Besides being unprecedented, technologically advanced and scientifically useful - The display looks very cool! It can also made to display "White-on-black" (for low light use) at the press of a button. This setting, is recommended for use in darkness (in the field, etc.).

In regards to my more recent reviews; I've been trying to keep a new goal in mind: I've made an effort to keep my reviews a bit shorter; whenever possible. Of course, with some new bat detectors - They simply have too many features to effectively cover on just one, long page. This new EM3 is a good example, of such an instrument. Like other high-end ultrasonic detectors: It has lots of features!
The new Echo Meter 3 arrived promptly, and was very well packaged. As you can see, from the photos: The EM3 is shipped to you with a lot of extras, as standard accessories. Last, but not least of which, is a really neat custom nylon carry case. The EM3 fits in the case like a glove. And, provides sufficient protection.

I'd like to convey the new EM3's features, in the "order in which they were discovered" by me. I presume most new owners of this unit will come across the features of this instrument in the same "order" that I have ~ So, I believe this format will be useful.
As stated on Page 1, of the User Manual: "The default factory settings allow you to begin monitoring bats in minutes."

First, I'm happy to report that the unit does fit comfortably in the hand. Even with the Garmin GPS unit attached to the back. The next feature, that I happen to like - Is the bright, bi-color LED (on the side of the unit) which serves as a battery charging status indicator. Red while the batteries are charging and Green when charging is complete. It is super-bright - Not to worry, it won't be illuminated during normal use (in the field).
I've noticed that the (included) rechargeable batteries charge-up in a very short time. Seemed to be < 30 minutes to me (although I didn't time it).

Next: Powering up - I love the splash screen. You get to see the different, subtle shades of color that make up the display. See for yourself, in the pic below:

Installing the Garmin GPS unit is very easy - Simply press it against the (modern-style) dot fasteners; and you're done. It is held in place very securely:

More to follow...

Review EM3 Part 2 Of 2

Monday, January 16, 2012

The EM3 From Wildlife Acoustics

Just a heads-up, to let you know that the next bat detector I'll be testing & reviewing will be the EM3 from Wildlife Acoustics, Inc. I urge you to check out their Web page - I know that there has been a lot of anticipation surrounding this brand-new, and unique detector...

...See the photo below - To get an idea of what you receive, when you order a new EM3 unit; from Wildlife Acoustics:

- To begin with, this is what it looks like, when your package arrives - You can see the (optional) Garmin GPS unit, in the upper left hand corner.
As you can see, lots of new accessories are included: A brand new 4GB SD card, rechargeable NimH batteries and charger. Also included, are multiple plug inserts for the power adapter; for mains outlets in several countries.
As you can see, in the photo below; each EM3 is provided with a (really nice!) nylon custom carry case. There is also a convenient belt loop on the back - Neat!

Some additional pics of the unit:

Stay tuned!

Monday, January 9, 2012

Review: The Batango From Dodotronic

Review Of Dodotronic's Batango

One of the newest bat detectors on the horizon, also happens to be the smallest. It is the latest offering from Dodotronic, makers of the now well-known Ultramic series of microphones. It is called The Batango. And, believe it or not - It is a fully operational, frequency division bat detector that is made to fit on your key ring!

The Batango's design is simplicity itself: A very small black plastic enclosure; with one momentary push button, and one red LED indicator. This simple ultrasonic detector, is controlled exclusively by this one button. Each of the different settings - Such as: Power On/Off, Volume Up/Down, and Frequency Division Factor settings - Are all adjusted entirely by a simple sequence of button pushes.

See Dodotronic's Batango Web page; for a complete, graphical explanation.
As you can see: The unit is small! Now, you'll never have to miss listening to/or recording some unexpected bat activity!

One side of the unit features the MEMs microphone element (not shown in photo above), along with a 3.5mm Earphone Jack - Which provides audio output.
The unit is powered by a small, "button-type" battery (CR1220 3V Lithium cell) which lasts a good long while. The battery supplied, is still going strong (after a lot of testing).

In the beginning, I've found that it's a good idea to have a print-out of the instructions handy (just until you become familiar with it's operation).

Since Winter is upon us, and my area is currently experiencing very cold temperatures - Ivano Pelicella of Dodotronic, also supplied me with a small, electronic bat sound emulator (this very small circuit was shown on Dodotronic's Web page demo). Pressing a momentary micro switch on the circuit, produces ultrasonic chirps for testing, etc. In addition, I'm also trying to sort through my CDs, .wav files, and some online resources; to locate some (raw) bat recordings, which I would like to try The Batango on as well.

Preliminary tests, using only a pair of (average/inexpensive) earphones were very good. The unit is excellent at rejecting man-made ultrasonic noises. Such as: The ever-popular, rubbing of index & middle fingers against your thumb, or clicking of fingernails, etc. I've recently been informed that this is by design - The unit was designed to reject sounds below 20kHz in frequency.
At the same time, however - It has no problem picking up the ultrasonic pulses produced by the bat chirp emulator. So, this is great news!

I did notice that The Batango does not feature the same kind of pick-up range, as a normal/full-sized detector. At the same time, I realize that this key-chain-sized detector would not be used in settings where long pick-up range is needed. In my opinion, it's great to have handy for serendipitous monitoring of bats. In other words, in those situations where/when you unexpectedly see bats flying about (while you're away from home).

Some other examples, of settings/locales: You may happen to be visiting, with your Aunt Adele (or your Uncle Dominick). And, when evening begins to roll around...you notice that your Aunt (or Uncle's) backyard has more natural bat habitat that you originally remembered.
Or, there is a small wooded lot or other "batty looking" area that you hadn't noticed before... Or, you are dining at a restaurant, and step outside for some fresh air (while waiting for the main course to arrive) and you notice what you are almost sure was the erratic flight of a bat... I'm sure you can understand my point; and you can just imagine the different possibilities!
The other nice thing about it, is that it can be used very discretely. Most onlookers, or a passerby will think you're simply listening to your MP3 player...

Again, since these types of spots are places where your first indication of bat activity is likely to be visual; the pick-up range of the Batango will be adequate.

In regards to The Batango's recording performance, and sonogram production: The unit wasn't exactly designed with those uses in mind. I will share some excerpts, of a recent e-mail, from Ivano Pe
licella of Dodotronic:

"...As I've written in my website it's not suited for audio recordings since the outcoming waveform is synthesized and the spectrogram can have a lot of harmonics due to the square waveform of the internal sound generator. For ultrasound recording the Ultramic is the best solution.

The frequency range is 20 khz ~ 140 khz...Batango has an internal filter that cuts all the signal below 20khz, this is the reason why it's so immune to normal audio..."

So, I've given it some thought - And, after careful consideration: I've decided that instead of writing a Part 2 to this review, I will leave it as-is. And, if any additional info needs to be added - I will add it to this post.
The completed, full production units will be available for purchase from Dodotronic in a few months. In the meantime, any questions may be directed, via e-mail to Ivano Pelicella at Dodotronic.
Winter is a good time to organize your notes, sound recordings and sonograms; to be ready for Spring...

General Thoughts About Active (handheld) Bat Detectors Part 2 of 2

General thoughts & Considerations About Bat Detectors Part 2 of 2 "Ah, but a man's reach should exceed his grasp, Or what's...