€550
Hybrid Stereo Parabolic Microphone (HSPM)
Estimated delivery: December 2020
Hybrid Stereo Parabolic Microphone (HSPM)
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Quentin-DupriezPreux-au-Bois
15
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10/31/2020
End date
15 pre-orders
Out of 28
54 %
Hybrid Stereo Parabolic Microphone (HSPM)
<p><strong>Project</strong><br />
<br />
The idea of creating a large parabola dish is born from my obsession of perfecting bird sound detection. A few decibels can sometimes be decisive in the identification of migrating birds.<br />
<br />
Because large parabola dishes cannot be found on the market, I set myself on a path of designing 30 polycarbonate custom-made dishes (the minimum number to order for the making of a specific mold).<br />
<br />
After many tests including different 3D modelisations of the various parts and microphones positioning, a functional, market-ready prototype was born.<br />
<br />
The target of this presale is 28 dishes. First come, first served basis. </p>
<p>If more dishes are needed, a second presale will be organized.<br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677958/Illus_kiss_kiss_2-1596960474.jpeg" width="100%" /><br />
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<strong>Conception</strong><br />
<br />
The main interest of a parabola dish is to concentrate sound waves on a point, its focus. It amplifies sounds in a way correlated to the dish size. The larger the dish, the greater the amplification.<br />
<br />
However, sound detection through parabola dishes is very directional. This could be limitating for specific use, like migration counts: birds rarely fly and call in straight in the dish beam.<br />
<br />
From this assessment came several ideas :<br />
- get the biggest parabola dish as possible to allow maximum amplification; the only limitation was to be able to transport it in a car<br />
- get a hybrid system, combining the advantage of a parabola dish with those of a stereo ambiant system, for a better amplification (especially important for migration counts).<br />
<br />
<strong>Specifity</strong><br />
<br />
The main specificity of this prototype, beyond its size, is its hybrid microphones positioning:<br />
<br />
- 2 stereo microphones in the focus, facing the inside and offering a strong amplification and directivity<br />
<br />
- 2 microphones outside of the parabola dish, facing the exterior and offering a large stereo ambiant<br />
<br />
This positioning gives the parabola dish the advantage of both a parabola and a stereo ambiant system. It is particularly adapted to migration counts, nocturnal or diurnal, but is also perfect for specific recording thanks to its directivity. <br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677959/IMG_20200530_085457-1596960536.jpeg" width="100%" /><br />
<br />
<strong>Features</strong><br />
<br />
Parabola dish <strong>:</strong><br />
<strong>- </strong>thermoformed polycarbonate, a very strong plastic (temperature, UV, impacts, keep its shape)<br />
- thickness 2mm<br />
- diameter 1100mm<br />
- depth 305 mm<br />
<br />
Microphones :<br />
- Primo EM272, successor of the EM172, well-know for their high sensibility and reliability<br />
- assembled in stereo 2x2<br />
- 1m cable, jack 3,5mm plug-in-power or 2x XLR Neutrik (please tell in the order what you need)<br />
<br />
Microphone support :<br />
- 3D ABS print (strong plastic resisting to impacts, temperatures and UV)<br />
- can be taken apart with a screwdriver for the replacement of a capsule<br />
<br />
Handle : <br />
- 3D ABS print (strong plastic resisting to impacts, temperatures and UV)<br />
- support part for the recorder with a ¼ screw (supplied in the kit)<br />
- the handle is disposed at the gravity center to facilitate the transportation<br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677961/IMG_20200530_090137-1596960614.jpeg" width="100%" /><br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677964/IMG_20200530_090027-1596960966.jpeg" width="100%" /><br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677965/IMG_20200530_085552-1596960985.jpeg" width="100%" /><br />
<br />
Fixation pole :<br />
- aluminium 15x15x2mm<br />
- very rigid and resistant (humidity, impacts, temperatures, UV)<br />
- maintain the right position of the microphones in the focus<br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677962/IMG_20200530_085703-1596960637.jpeg" width="100%" /><br />
<br />
Tripod support :<br />
- 3D ABS print (strong plastic resisting to impacts, temperatures and UV)<br />
- quick tripod release plate (supplied in the kit) attached to the support and can be taken apart<br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677967/IMG_20200809_101356-1596961106.jpeg" width="100%" /><br />
<br />
Windshield :<br />
- Rycote long hair<br />
- custom-made<br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677963/IMG_20200530_085403_1-1596960891.jpeg" width="100%" /><br />
<br />
Assembly :<br />
- assembled from SMX polymeres<br />
- very resistant and durable<br />
- stainless steel screws and bolts<br />
- every parabola is assembled carefully by myself <br />
<br />
Weight :<br />
- 3350 grams<br />
<br />
Size :<br />
- 120 x 43,5 centimeters<br />
<br />
<strong>Tests </strong><br />
<br />
These recordings have been done with this parabola and a Mixpre 3 :</p>
<p>Marsh Warbler (Maroille, France) https://soundcloud.com/quentin-dupriez/rousserolle-verderolle-chant-aa-bots-mixpre3-maroilles-202005310730<br />
<br />
Bluethroat (Maroilles, France) https://soundcloud.com/quentin-dupriez/gorgebleue-a-miroir-chant-aa-bots-mixpre3-maroilles-202005310800<br />
<br />
Common Grasshopper Warbler (Maroilles, France) https://soundcloud.com/quentin-dupriez/locustelle-tachetee-chant-aa-bots-mixpre3-maroilles-202005310745<br />
<br />
<strong>Warning </strong><br />
<br />
The parabola shape highly focuses sun rays. As a consequence, temperatures can rise at focus and light the windshield or melt the microphone support easily!<br />
Please <strong>DO NOT</strong> leave the parabola dish faced in the sun during the day!<br />
<br />
<strong>Construction and delivery time</strong><br />
<br />
1 month from the end of the presale for the first 28 pieces, and 2 to 3 months beyond the 28 pieces.<br />
<br />
<strong>Price </strong><br />
<br />
- Full kit, ready to use ;<br />
<br />
<strong>550€</strong> (all taxes included)<br />
<br />
<strong>Shipping cost</strong></p>
<p>France : free !</p>
<p>Germany : 39 €</p>
<p>Belgium : 22 €</p>
<p>Spain : 80 €</p>
<p>Italy : 78 €</p>
<p>Luxembourg : 22 €</p>
<p>Netherlands : 29 €</p>
<p>United-Kingdom : 71 €<br />
<br />
Other destinations or any question, feel free to contact me : dupriez.quentin@gmail.com<br />
<br />
You can also pick it up at my house, at Preux-au-Bois (59288, France) <br />
<br />
<img alt="" src="https://d3v4jsc54141g1.cloudfront.net/uploads/project_image/image/677966/IMG_20200530_085349-1596961031.jpeg" width="100%" /></p>
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Allocation of funds
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