Please also check out my latest design, a Long Range Dog Whistle at 7000 Hz. Please download here. | I have also developed other Ultrasonic dog whistles at 20,000 Hz and above, which you can find here. |
WARNING:
This is a dog whistle and not a toy! It's very loud which can harm the ears, so please protect your ears and don't use it near other people or animals!
About:
I wasn't sure if I should even release this whistle design with a frequency of 23 kHz - deep in the ultrasonic range. For the following reasons:
Anyway - here is what will probably be my last ultrasonic whistle design for the time being. I could go higher than 23 kHz but I don't see any real benefit in it. And, to be honest, I find it rather unsatisfactory in the long run to design and test more and more inaudible whistles ...
As I wrote before, you most likely won't be able to hear this whistle!
On some smartphones the function can be tested with this this android app. There are certainly similar apps for iPhones.
Please don't downgrade my print profiles if it doesn't work.
This can definitely happen - depending on the filament and printer. But even if it works, most people won't be able to check it due to a lack of suitable equipment.
How to print:
First of all: due to the short wavelengths of ultrasound, this whistle has very small structures inside. Therefore, this print will only be successful on a very precise printer. Even small deviations (for example in the flow or the dimensional accuracy of the printer) can lead to frequency deviations or cause the whistle not to work at all.
Use a 0.4mm nozzle with a line width of 0.4 mm and a layer height of 0.2 mm, 6 top layers and 6 bottom layers.
The whistle requires correct positioning of the Z-seam - it shouldn't be placed in the narrow air passages inside the whistle.
Print slowly!
Filament selection:
It is strongly recommended not to use fancy filament types, but instead use standard PLA, such as Bambulab PLA Basic. Variants such as “matte”, “silk”, “glitter”, etc. should be avoided as they can affect the smoothness of the walls in the airflow.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.