![]() 238000005516 engineering process Methods 0.000 description 2.XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2. ![]() 229910052782 aluminium Inorganic materials 0.000 description 2.230000005611 electricity Effects 0.000 abstract description 6.239000000789 fastener Substances 0.000 claims abstract description 12.239000000463 material Substances 0.000 claims abstract description 26.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Claypool James P filed Critical Claypool James P Priority to US10/860,895 priority Critical patent/US7014329B2/en Publication of US20050270673A1 publication Critical patent/US20050270673A1/en Application granted granted Critical Publication of US7014329B2 publication Critical patent/US7014329B2/en Status Expired - Fee Related legal-status Critical Current Anticipated expiration legal-status Critical Links ![]() Claypool Original Assignee Claypool James P Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US10/860,895 Other versions US20050270673A1 The last step of the instructable contains some tips on how to improve the reflectors in order to create parabolic speakers that work better.- Google Patents US7014329B2 - Parabolic reflectorĭownload PDF Info Publication number US7014329B2 US7014329B2 US10/860,895 US86089504A US7014329B2 US 7014329 B2 US7014329 B2 US 7014329B2 US 86089504 A US86089504 A US 86089504A US 7014329 B2 US7014329 B2 US 7014329B2 Authority US United States Prior art keywords spiral side parabolic spiral segments side segments Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. When applying the clay to the stainless steel and the plastic reflector a small decrease of the volume was measured at the back of the reflector. When applying the aluminum foil to the cardboard and plastic reflector a small improvement was measured according to direct the sound. The stainless steel reflector worked best, which was as expected due to the high reflective qualities of stainless steel and the smooth surface of the bowl. The reflectors did increase the volume of the sound, but they did not only reflect it into one specific area. After testing the reflectors we concluded that the parabolic speaker did not work as well as desired. In this instructable is being explained what steps are taken in order to make and test the parabolic reflectors. (See the attached document for theoretical knowledge on why to use aluminum and clay layers.) We tested them with a layer of aluminum inside and/or clay on the outside and without any layers. To find out what is the most effective parabolic speaker, which can be easily prototyped, we performed some tests with reflectors made out of different materials: cardboard, plastic and stainless steel. (For more information about parabolic and directional speakers see the attached document.) The parabolic speaker consists of a parabolic reflector and an existing speaker. A parabolic speaker reflects the sound of a sound source into one direction only, which makes it theoretically possible to focus the sound at a specific area as a directional speaker does. These (parametric) speakers are quite expensive, so we tried to make parabolic speakers, which can be seen as an analog version of the directional speaker. With a directional speaker it is possible to target audio at a specific area, so that people present inside this area can only hear it. We aimed at making an “analog” directional speaker. ![]() This instructable explains how to make and test parabolic speakers.
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