Showing posts with label Part 2 Of 3. Show all posts
Showing posts with label Part 2 Of 3. Show all posts

Friday, August 26, 2011

Review of The SM2BAT System From Wildlife Acoustics Part 2 Of 3

Review of The SM2BAT system from Wildlife Acoustics Part 2 Of 3

The SM2BAT happens to be the approximate size of other comparable unattended recording solutions. In fact, it is a bit smaller than some. It is easily portable, fitting one (along with accessories, etc.) into a backpack is effortless. Without batteries installed, the unit is very light. In fact, you could probably fit 2-3 units in a backpack (depending on the size of the backpack).

The layout of the unit is nice and simple. The SM2 platform features a large LCD display, several jumpers for setting filtering parameters, and a green LED (for status indication). Sensitivity and filtering are fully adjustable, across the spectrum of the unit's abilities.

The fact is, that once you've read the User Manual(s); and become familiar with operation of the unit - You'll probably find your bat recording becoming so automated; that you'll become lazy! Especially, for those of us who are used to the typical set-ups required for overnight bat recording. In most cases, this consists of:

Standard check of the detector - Battery condition, and any other settings
Standard check of the recorder - Same as above
Locating your audio cable - For connecting the two
Masking (adhesive) tape, etc. for temporary mounting 

Once the SM2BAT is set-up, you can let it go for a few days, a week, or more! And, the unit will diligently record bats, every evening - From sunset to sunrise. So, you can see how easily one can become "lazy".
Click Here to see a graphical representation of the unit's specifications.

OK! On to some more good stuff!

Among the features I like:
The fact that the unit records unadulterated sound, in 192kHz, is great!
The nice selection of audio filtering combinations available. There are lots of options selectable from the jumpers. Below, is a pic of how the unit's jumpers were set at the end of my testing:
Over the testing period, they were slowly migrated, from left to right : )

The fact that the unit can be used as a "Set-and-forget" recorder (for up to 9 days, in any case) is a plus.
The unit is very economical; especially when compared to the similar systems that are currently available.
If you have a quick look at the Comparison Chart, on the Wildlife Acoustics site, you'll see what I mean.
The SongScope software, from Wildlife Acoustics is very versatile; and produces nice-looking (and informative) sonograms.

With the great help/suggestions and support I received from the Folks at Wildlife Acoustics, I ended up with a diverse collection of recordings. The nice thing about it, is that I was able to test a lot of different variations of settings. In a short period of time. You can basically go either way, in your approach to the use of this system: You may choose to rely mostly on the default settings - And take a more simple approach (which is exactly what I did in the beginning of the test period). Or, you may be the type who enjoys tinkering & experimenting. In which case, you'll find no shortage of combinations/settings available to you.

Among the features that I'm not crazy about:
Obviously, one of the drawbacks, is that it cannot be used as you would a typical hand-held bat detector. You can't just grab it and go, on your way out to the woods, or to attend a Bat Walk.
I also wish there was a way to insert and remove the SD cards a bit more easily - Instead of having to remove one of the D-cell batteries each time.

The additional offering of the free, WAC2WAV software - Which is of course, as the name implies: For converting the propriety Wac files into universally used Wav files - Could be placed in both the 'Like' and 'Dislike' category. Likes would be: That it is free, and very versatile. I must confess, that it does offer some features that I find fascinating. Such as systematic removal of noise - In the form of separate Noise Files that are automatically created. As well as a few other neat little options.
But, at the same time, the Dislike would be: The fact that it is needed in the first place!

There is still the matter of providing sonograms, and possibly some recordings; produced by the SM2BAT. The fact that my original hard drive is (temporarily) inaccessible prevents me from posting them easily.
So, I'd rather just go ahead and extend this review a bit: Stay tuned for Part 3 of this Review...

In conclusion, I have a feeling that I'll be writing some more posts demonstrating the abilities of The SM2BAT Platform soon. In addition to the final installment of this review (AKA Part 3). I may be "re-visiting" this unit, and the Pettersson D240X in future posts. Since at this time, I consider both of them to be very impressive.

Click here for Part 3 Of 3 of this review

Happy bat detecting!

Friday, June 10, 2011

The NEW Batscanner from Elekon! Part 2 Of 3

Well, the good news, is that I'm now the happy owner of a brand-new Batscanner from Elekon.
The bad news, is that it will be raining here for the next 3 nights! : (

Since I'm currently unable to write one of my regular, full reviews yet (with no bats on the wing); I'm anxious to share what I can, about this new detector. So, this is Part 2, of a 3 Part post.
Part 3, will be a full review of The Batscanner, along with a performance report, of how well it picks up bats, etc., etc.  : )

Let's see...As I stated, in Part 1 - The unit is sensitive! One can immediately tell how sensitive it is, simply by powering it on, and rubbing your fingers together in front of the microphone. The microphone on this unit, is the now popular MEMs type. When in the field (without any man-made or electronic interference nearby):
Pressing the power button will cause the unit to display three dashes " - - - " on the (green) LED display.
In contrast to powering it on indoors, where it will latch on to whichever electronic signal that reaches it first.
As you can see, in the photo below:

The above photo was taken very close to a WiFi router and laptop computer, so...

As you can see, this unit fits very comfortably in the hand! It also seems to fit in just about any pocket. The unit simply displays the last frequency that was detected; until a new bat flies by, within it's range. I believe this is a clever arrangement. It is also useful, in case you weren't looking at the display during the bat pass - You can just look down & see what the detected peak frequency was.

For now, the only "nit-picking" I can do, is in regards to battery changing. You do need a small Phillips head screwdriver in order to remove the 2 small screws that hold the battery door in place. But, as far as I'm concerned this arrangement isn't too bad. My minor issue, is that you need good dexterity to properly insert the batteries. It's a slightly tight fit. I've found an easy method: Always insert the (+) positive side of the battery first, then the (-) negative side will slide in easier. Another issue of concern, is that the unit seems to power itself off, after about 30 minutes of inactivity. Not very good for un-attended recording! It seemed to have powered off at least 4 times during the night (I kept checking it, of course). I needed to press the power button, to turn the unit back on. Hmmm...I'll have to look into this further; and possibly contact Elekon.

I've always used NimH re-chargeable batteries, in all my bat detectors. This one is no different. Many years ago, I learned (from the R/C toy hobbyist "community") that Sanyo brand batteries were tested & found to be the best performing batteries of all. So, I try to buy them whenever I can. Battery usage for this unit seems good. Luckily, there has been very little rain this evening - I've installed 3 newly-charged AAA (Sanyo) batteries, and I've already picked up some bats (using the BatBox Baton). The Elekon Batscanner was set-up, right by it's side : ) I've just finished going through those recordings. And, it seems that the Batscanner was unable to produce any good recordings yet... I'll need to find out why that is.

Here is a quick pic, of the two digital voice recorders in use, along with one of Sanyo's latest batteries; called 'eneloop' -
'
These Olympus recorders are both set to use the 'VCVA' (voice-activated) recording feature. Finding the correct combination of volume setting on the new detector and the VCVA setting on the recorder (on the right) has proven to be quite frustrating.

So far, I like this detector! Stay tuned for Part 3 of the Elekon Batscanner testing.

Click here for Batscanner From Elekon Review Part 3 Of 3

Happy bat detecting!

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