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KJW (UK)

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BarkStopper Ultrasonic and audible bark deterrent device.
BarkStopper Ultrasonic and audible bark deterrent device.
Offered by UK Innovations GP Ltd
Price: £17.95

0 of 1 people found the following review helpful
3.0 out of 5 stars Technical appraisal. Does it work? Could it work? etc, 28 Feb. 2015
Verified Purchase(What is this?)
First plus point is that it is quite a sturdily made unit. One immediate basic design flaw though is that when holding it normally, your fingers will obstruct and muffle the 'audible' output hole on the back so very little sound actually gets out! Tested it against a professional sound meter and found it produces audible chirping across a wide frequency range with a max of 74db at 4k. It's not a particularly unpleasant noise and certainly is not loud - whereas most personal attack alarms give a shrill ear piercing noise which deafens you because it's about 120db. So the audible sound is distinctly unimpressive! The ultrasonic side of it comes out of the end of the device and was measured at a max of 74db but we humans can't hear that high and it was difficult to measure what frequency the ultrasonic sound is actually at and theres no information given about it in the spec. Where it gets interesting is that the claims for these and similar devices to "stop dogs in their tracks" etc is unlikely because to a dog it's just another noise. It's not inherently unpleasant to them. Dogs can generally hear everything in a much wider frequency spectrum than humans. Humans hear between 20Hz and 20KHz whereas dogs hear between 67Hz and 44KHz, but because they are used to hearing everything in that wider ultrasonic spectrum so it's difficult to understand why hearing an alarm in the ultrasonic part of their broader hearing range should bother them particularly - and in my trials of the device in the vicinity of dogs I found they either totally ignored it or simply turned to look towards it with mild curiosity. You could add into the equation the fact that a dog's hearing is 4 times more sensitive than a humans, which is why they alert us when they hear faint sounds which we don't. But remember that the dog is used to hearing everything at that level of sensitivity anyway so again the ultrasonic frequency device is no big deal for it because everything is louder anyway. The biggest failing of the device is knowing whether it is actually working or not when in ultrasonic mode as there's no indicator lights etc. to confirm you don't have a flat battery and to rely on using it against an attacking dog is not the best time to find out.... So in summary, you might feel better prepared carrying one, but you're probably better off with a standard personal attack alarm giving an ear splitting 120db of noise that the dog and hopefully the dog owner too can also hear. On the other hand as a device to simply stop a dog from barking it might disturb their barking simply out of curiosity as to what that new noise is and stop barking in order to listen to it.... I haven't found it to be particularly effective in this either but as a close range trainer at 12 inches like shown in the photo it probably would work as a training device. No way do I think it will it work on your neighbours dog because the distance a sound travels reduces significantly as the frequency increases - like you hear the bass of music in an approaching teenage drivers car much further away than the high notes, so ultrasonic is likely to be inherently quite a short range device.


Crime And Punishment: A Novel in Six Parts with Epilogue (Vintage Classics)
Crime And Punishment: A Novel in Six Parts with Epilogue (Vintage Classics)
Price: £4.35

5.0 out of 5 stars An outstanding read, 6 Feb. 2015
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One of the most absorbing and moving books I've ever read. Outstanding!


Skins Bio A200 Compression Tight Shorts Black Black/Yellow Size:L
Skins Bio A200 Compression Tight Shorts Black Black/Yellow Size:L
Price: £27.99

5.0 out of 5 stars Tight!, 6 Feb. 2015
Verified Purchase(What is this?)
Really tight. Good for active sports if you've any abdominal weakness.


Omron M2 Basic Upper Arm Blood Pressure Monitor
Omron M2 Basic Upper Arm Blood Pressure Monitor
Offered by Beautiful Bargains UK
Price: £22.58

5.0 out of 5 stars Good enough, 6 Feb. 2015
Verified Purchase(What is this?)
Accurate enough for home use.


Nonin GO2 Achieve Fingertip Pulse Oximeter - Green
Nonin GO2 Achieve Fingertip Pulse Oximeter - Green
Offered by Nonin
Price: £78.00

5.0 out of 5 stars Good compromise, 6 Feb. 2015
Verified Purchase(What is this?)
A good compromise between a cheap unit and a professional unit. Readings are accurate enough when tested against professional £450 Ambulance Service unit.


Mindfulness: A practical guide to finding peace in a frantic world
Mindfulness: A practical guide to finding peace in a frantic world
Price: £4.68

1 of 1 people found the following review helpful
5.0 out of 5 stars Text OK but no CD, 6 Feb. 2015
Verified Purchase(What is this?)
By buying the Kindle version you loose out on the accompanying CD which is a major part of the course - so not as great as it could be.
AN UPDATE! I've discovered you can download the accompanying audio for free from the publisher's site at http://rodalebooks.s3.amazonaws.com/mindfulness/index.html So full marks to the publishers - just a pity Amazon keep it a secret....


Planet Waves Pro-Winder String Winder and Cutter
Planet Waves Pro-Winder String Winder and Cutter
Price: £7.51

3.0 out of 5 stars Three Stars, 6 Feb. 2015
Verified Purchase(What is this?)
Good for winding strings but peg extractor too small for use on Taylor guitars.


Rieker  05344 Boots Mens  Brown Braun (tabak 25) Size: 10 (44 EU)
Rieker 05344 Boots Mens Brown Braun (tabak 25) Size: 10 (44 EU)
Offered by Charles Clinkard
Price: £72.00

3.0 out of 5 stars Would be better if it wasn't fluffy...., 6 Feb. 2015
Verified Purchase(What is this?)
This review is from: Rieker 05344 Boots Mens (Shoes)
Nice looking boot, but the fluffy lining makes it too small a fit.


Corded Hessian Noticeboard Class 1 Aluminium Framed 900mm x 600mm, Grey Green
Corded Hessian Noticeboard Class 1 Aluminium Framed 900mm x 600mm, Grey Green
Offered by Pitts Presentation Products Ltd
Price: £22.63

5.0 out of 5 stars Excellent., 24 Aug. 2014
Verified Purchase(What is this?)
Well made quality product.


Elixir 80/20 Bronze Acoustic Sets Ultra-Thin Nanoweb Coating - Light (0.012 - 0.053)
Elixir 80/20 Bronze Acoustic Sets Ultra-Thin Nanoweb Coating - Light (0.012 - 0.053)
Price: £14.95

5.0 out of 5 stars Excellent, 24 Aug. 2014
Verified Purchase(What is this?)
Beautiful sound on high end guitar.


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