Where can I find a virtual speaker for different languages?

Where can I find a really, really, really tiny speaker? (exact parameters below)

• I just dremelled the flip-cover off my Handspring Treo 300 -- it now looks roughly like this: http://mywebpages.comcast.net/jkassay/treo1.jpg I need to find a speaker I can put into the case to replace the one that was part of the flip-cover. The cavity I have available to put it in is very small -- the face of the speaker must be no more than 1/4" tall by 1-1/4" wide, and the body of the speaker must be no more than 1/4" deep. So an oval (rather than circular) speaker is probably the most appropriate. The old speaker was "8 ohms, 0.2 watts" (written on the back of the speaker). I don't know much about electronics, but the new speaker either needs to be the same spec or compatible with it. The old speaker could perform as a speakerphone, but that's a function I really didn't care about -- so the new speaker doesn't have to be as loud as the old one. Thanks!

• Answer:

  Hi megacz, I started by searching for 8-ohm speakers that could handle 0.2 watts. The smallest circular speaker that I could find which met these criteria was 13mm diameter and 3.1mm thick: Kingstate KDM-13008 micro speaker http://www.kingstate.com.tw/product/KDM-13008/KDM-13008.gif Kingstate Electronic Corp. also has the smallest oval-shaped speaker that I could find. Its face is 20mm by 10mm, and it is 4mm thick: Kingstate introduces new product: KDO-2010008SN http://www.kingstate.com.tw/p3/P3-49.htm If you can find a way to fit one of these tiny speakers into your Treo, this will be the most straightforward and satisfactory solution. These speakers are designed for applications such as mobile phones and PDAs. Smaller speakers are available, but they are designed for hearing aids and digital watches. They are "really really really tiny", but the impedance is usually quite high and the power handling capacity quite low. The sound level will be low, the distortion relatively high, and the frequency response may be limited. Using a speaker with an impedance higher than specified is unlikely to cause damage to low power equipment, and I'd be quite willing to use one if this were my Treo. But it's not, and I can't absolutely guarantee compatibility. Here are some very small hearing aid speakers. In each case, you can click where it says "Click here for model chart" and you will see the range of power and impedance specifications available. Look for ones that do not need a DC bias. BK series (6.35 x 4.34 x 3.02 mm) http://www.emkayproducts.com/html/bk_series.htm CI series (9.53 x 7.24 x 4.19 mm) http://www.emkayproducts.com/html/ci_series.htm EC series (7.59 x 4.34 x 3.73 mm) http://www.emkayproducts.com/html/ec_series.htm ED series (6.35 x 4.34 x 3.02 mm) http://www.emkayproducts.com/html/ed_series.htm From the above list, you could consider for example the BK-8507. The impedance varies from 10.7 to 30 ohms according to frequency. Here is the data sheet for the BK series, and the detailed specification for the BK-8507: http://www.emkayproducts.com/assets/images/pdf/BK%20data%20sheet%20-%20Issue%2003.pdf http://www.emkayproducts.com/assets/images/pdf/BK-8507.pdf The Electronic Goldmine of Arizona sells a "Tiny Swiss Watch Micro Speaker" at two for $1. They are 40 ohms, and are 8.9 mm diameter and 5.4 mm thick. You can possibly fit five of these wired in parallel - this would give an input resistance of 8 ohms. The catalog makes a comment about "driver required", but that is on the assumption that you would be using it as a beeper rather than a speaker. Don't expect good sound quality if used as a speaker - these devices have a marked resonant frequency which facilitates their use as a beeper. The Electronic Goldmine - New Arrivals http://www.goldmine-elec.com/images/Pages004-007.pdf (on page 6 of their catalog, which is the third page of this PDF file) I hope you find this range of options useful. I recommend looking into the two 8-ohm speakers that I mentioned first, to see if there is any way that you could accommodate them into the case. Finally, for your convenience, here is a metric conversion table: 1/8 inch - 3.175mm 1/4 inch - 6.35 mm 3/8 inch - 9.525 mm 1/2 inch - 12.7 mm 5/8 inch - 15.875 mm 3/4 inch - 19.05 mm 7/8 inch - 22.225 mm 1 inch - 25.4 mm Additional links: Kingstate Electronics Corp. home page http://www.kingstate.com.tw/index.htm Emkay Products home page http://www.emkayproducts.com/ Electronic Goldmine home page http://www.goldmine-elec.com/ Google search strategy: "miniature speaker OR loudspeaker" ://www.google.com/search?q=%22miniature+speaker+OR+loudspeaker%22 "micro speaker" ://www.google.com/search?q=%22micro+speaker%22 "micro speaker" oval ://www.google.com/search?q=%22micro+speaker%22+oval "BTE OR ITE applications" ://www.google.com/search?q=%22BTE+OR+ITE+applications%22 "micro speaker" watch ://www.google.com/search?q=%22micro+speaker%22+watch Regards, eiffel-ga