Piezo Transducer
Piezo Transducer
 |
 10 20mm piezo discs disk transducer drum guitar pickup  US $3.00
|
 4pcs Guitar Transducer Piezo Under Saddle Pickup Pick U US $.49
|
 GUITAR Acoustic Pickup Piezo Transducer Tuner NEW US $9.89
|
 Shadow SH 2001 Quick Mount Instr Piezo Transducer w vol US $72.95
|
 5 20mm BRASS Piezo Disc Disk Transducer Drum Trigger US $7.99
|
 5PCS Guitar Transducer Piezo Under Saddle Pickups US $8.88
|
 Piezo Pickup End Pin Jack Guitar Transducer slide in US $12.60
|
 Barcus Berry 1457XL Outsider Piezo Transducer US $55.97
|
 DUAL Piezo Transducer Contact Mic Pickup Guitar etc US $24.00
|
 50 pcs 43mm Piezo Discs Element Transducer DIY US $35.00
|
 Mallory Sonalert SC628D Transducer Piezo Brand New US $12.75
|
 10 pcs 95mm Piezo Discs Element Transducer DIY US $10.00
|
Frbiz.com Reports Chongqing Will Be Built Electronic Chip Production Base In China
To speed up the development of information industry in Chongqing Municipality has developed information industry, "1162" project, which includes an electronic chip production base will be built nationwide.
The plan said that by 2010 the whole industry realized 100 billion yuan sales income, planning 10 billion U.S. dollars of new investments during the period, focusing on the development of integrated circuits, software and information services, communications products, new components (including automotive electronics), digital instruments equipment (including digital medical), information appliances and other six major industries, efforts to build the West Wing Microelectronics Industrial Park and north of New District Hi-Tech Park, one industrial base.
Which is located in the West Wing Shapingba Microelectronics Industrial Park, an area of 10 square kilometers, will become a national electronic chip production base. In addition, the Chongqing Municipality "City Card" feature should be used next year to upgrade. City Council letter produced a special presentation on behalf of Chongqing "City Card" the latest development plan.
It is understood that "City Card" is the urban transport, communications, shopping and entertainment areas such as the use of IC cards for public consumption card rolled into one. With the completion of system construction within this year, Chongqing Municipality, "One Card" users will be developed to 60 million in areas such as buses, light rail, taxi, car parks, filling stations, welfare lotteries.
Next year will be extended to highways, shopping malls, leisure entertainment, and people are concerned about water, electricity, gas and other areas, card users will be developed into 1.5 million -250 million, and the achievement of the relevant product sales and services revenue 100 million yuan above, card spending by 20 billion yuan by 2010, the user is expected to reach 10 million cardholders.
What is the best Ultrasonic transducer?
1.Can a commercial (cheap) ultrasonic transducer having a center frequency of 40kHz be used to create ultrasonic waves of 18kHz to 2MHz.
2.I intend to create ultrasonic waves using a signal generator and an amplifier and I don`t know what to use as best transducer.
3.Can a piezo tweeter be used?
4.Can the ultrasonic waves be concentrated using a parabola?
5.I want to be able to create cavitation in a fluid in a test tube and I thought that the best way would be to use high powered ultrasonic waves. How can I calculate the correct lenght of a tube given a specific frequency?
Thanks.
a1)
O.K. what your talking about is the bandwidth of the transducer. A transducer will have a central frequency like you say (in this case 40khz) but it will also have a bandwidth. The bandwidth is the frequency range the transducer can operate within which will be less power output than the central frequency, however the power loss will only be limited. A transducer can usually operate outside of the bandwidth however the power loss will usually be more. The frequency range you are hoping to get from this 40khz transducer is quite high. I think it would be unlikely that it could do this range. If it can do this range, it would be very unlikely that the bandwidth would cover this range.
*note - you are not always able to get this bandwidth information before purchasing a transducer especially with a cheap transducer.
a2)
Choosing a transducer is very specific to the application which you are hoping to use it for. Some examples of questions to ask are; whether you need a water coupled transducer or an air coupled, whether the transducer will run in chirps/ pulses -ie. reduced duty cycle -(like for non destructive testing) or constant output, whether you require a narrow beam or a wider beam angle (like for distance measurement) or maybe you require the entire transducer to resonate (eg. bolted langevin transducer), how wide bandwidth you require, whether you will be attaching a horn (to concentrate and/or direct the output), whether it is a high output application or relatively low output, what the specific application is, what type of amplifier you are using (better to select the transducer before selecting the amp) - best if you can select a transducer that will run of a cheap amp like an pro audio amp if you want to save money, whether you require an industrial transducer or whether you could achieve your goals using a standard acoustic transducer like a loudspeaker.
a3)
piezoelectric and magnetostrictive are two different types of transducers. You could use piezo, it tends to have a wider bandwidth also, and it can also be used for very high frequencies. A standard tweeter would be difficult to use because it is only designed to only cover the audio range of up to 20khz. Also the output graph is something to consider. For example a tweeter may be rated to 20khz with a power output (spl) of 130db, but the output graph or output may drop off substantially at only 14khz. It is still rated to 20khz, but the power is very low at this level. I think that the frequency range you are trying to get is very wide, and maybe you will need an industrial transducer. As you appear to be trying to save money, maybe you can find a small or cheaper industrial transducer which can cover your application.
a4)
Do you mean a parabolic horn? Sometimes a horn is used to concentrate sound waves from a transducer. The transducer would have to be designed to accommodate a horn. A number of different types of horns are available. You would have to research this for your application. Professionally build horns can be very expensive. Maybe you can find a cheap copy somewhere, although it would be unethical to buy a direct copy of a more expensive design.
a5)
If you are serious about this you will have to do some research more than yahoo answers.
Transducer Pickup
Transducer Pickup
|
|
10 20mm piezo discs disk transducer drum guitar pickup US $3.00
|
 EMG AS93U Acoustic Transducer Pickup Un Used LK US $59.95
|
 BELCAT EGT 202 TWIN GUITAR TRANSDUCER GUITAR PICKUP US $4.99
|
|
4pcs Guitar Transducer Piezo Under Saddle Pickup Pick U US $.49
|
GUITAR Acoustic Pickup Piezo Transducer Tuner NEW US $9.89
|
 EMG AS93U Acoustic Transducer Pickup NOS NIB US $124.95
|
 20 27mm Piezo Disc Transducer Drum Trigger Pickup BRASS US $15.49
|
5PCS Guitar Transducer Piezo Under Saddle Pickups US $8.88
|
 SOUNDHOLE PICKUP ACOUSTIC GUITAR TRANSDUCER W VOLUME US $14.79
|
Maintenance And Repairs Questions & Answers
More Maintenance and Repairs questions please visit : YesImAuto.com
1987 Chevy 4x4 305 TBI extremely poor timing?
I hve a 1987 Chevy 44 Pickup with the 305 5.0.L engine equiped with the TBI system. It sit needing repair for over a year and a few months ago I replaced the rear prime seal and the clutch. It ran near intermediate acceleration problems,...
1987 flletwood bougham cadillac how to tighten the steering helm tilt pedals?
I need any information on how to tighten the tilt rudder on my 1987 cadillac fleetwood bougham? If anyone knows any information or where on earth i can find information i would appreciate it id close to to try and find a picture on how...
1987 ford bronco 2 rope smokes?
when i start the vehicle a gray wire smokes that goes to this black circle item on the passenger side im not sure what the black thing is i think this gray cable might go to the control module does anybody no what would cause this...
1987 ford bronco 2?
my 1987 ford bronco 2 wont get fuel first would start then would run consequently when got warm would die i replaced the distribiter and control module still same exact item changed fuel presure regulater hit fuel pump reset switch same thing when we sprayed ether...
1987 Golf GL?
I have a couple question. 1. The clutch has to much of a loose impression to it, i heard it be the linkage, but where is that and where on earth can i adjust it? or do i have to buy a foreign set? ...
1987 honda crx give a hand?
I've asked this question before and i win answers that i have no idea what they connote. I know nothing about the mechanics of a coupé so please put the answer in a dumbed downed version and inform me what i can do to fix it....
1987 Honda CRX will not rust but starts fine everytime?
asked this question before and someone replied to it and said - "Mine have the same problem. I just took a couple 12 mm wrenches and in tune the throttle until the rpm was at 750 to 1000." my question is how to do that....
1987 Honda CRX will not vacant but starts fine everytime?
When I first start it it idles for about the first 3 minutes after when i make a complete stop it just cuts rotten. But then it starts perfectly fund up and keeps going until another complete stop. If i apply a little gas at an...
1987 mercury topaz diagnostic conducting tests results...?
I went and bought a diagnostic trialling device and it gave me 5 codes: 24o- Intake nouns change heat (ACT) sensor or vane air heat out of range, 13c-RPM at decline is out of range/low, 34c-Insufficient EGR flow, defective EGR pressure transducer sensor and 10- cylinder #1...
1987 Merkur problem.>won't shut past its sell-by date?
Car quit at stoplight-- wouldn't restart- towed to repair place-ran diagnostic- fire into distributor, no fire out- replaced distributor with rebuilt--car run OK but somewhat sluggish. next day-- coupé started fine-- ran melt like enthusiast might not work --no turnsignals-cannot shut offengine with key--back to repair place--...
1987 Ramcharger wont run?
the damn thing have a new hat, rotor, plugs, wires, its timed correctly, and it wont run for **** at an idle......but if you hold er ball to the walls wide unequivocal it runs good..its a 318 2brl carb stock...except the straight pipes...and suggestions??...oh yea the...
1988 190e automatic 4cycl choke and stalling while driving..?
the car starts and drive but more than a 1/2 houre the sports car started to choke and stall. while driving so it can stop anywhere anytime.. see to start the car subsidise up i have to play near the spark plugs wires then it will start...
1988 2.3 ford wont start?
have strange plugs wires cap rotor have good spark verbs plugs there showery so i think im geting gas does not give the impression of being to have drop time
1988 3.8 Bonneville engine problem.?
this car when cold runs great soon as it warm up it tries to die and sputters,jerks ect.I dont know, could it be coil pack or mass air flow? anyway to check previously replacing?thanks surrounded by advance.
1988 Bronco. Changed fuel filter, checked fuel pump and motor is pumping gas, but still dies going down road.?
Have added HEAT to see if water in gas. Any other planning. It also is sluggish going up hills which makes me believe it is a fuel problem. I will check the fuel pressure too, so need other ideas. What is this in...
1988 buick lasabre rattle nouns close at hand engine when starting and when braking?
My mom is asking this question, any lend a hand would be lovely.
1988 Buick?? cooling devotee, how is it suposed to be turned on and rotten??
been have a over heating problem when contained by traffic. I think it is not turning on properly. When I first start the engine it turns on but afterwards goes bad before any boil registers on the temp guage. its on a 2.8 V^...
1988 c2500 4bbl carb to replace 2bbl TBI injection 350cid engine?
how hard would it be to replace a 2bbl TBI beside a 4bbl carb and keep the electronic ignition from 1988, I am sick of this cr*p one time your running ok afterwards the next time its over fueling afterwards running to lean and am sick...
1988 C2500 truck 350cid 5.7l rough fester?
My truck has be running like cr*p lately runs ok but if i drive aggressive bye hitting the gas strong its starts cutting within and out why new fuel filter,cap&rotor, wires, pick-up coil,coil, control-modulator,fuel lines and have 296,500 miles on it what would cause this...
1988 Cadillac Deville?
My 1988 Cadillac Deville starts with a jump relunctacly. I did tolerate it idle running for about 30 mins. turned it rotten waited about 5-10 sec. consequently tried to start it again .nothing 
jumper cable were NOT on while idling Does anyone own...
1988 Chevy Cavalier defrost will not work near bake adjectives the channel up?
I can not get the defroster to blow for the drivers side with the warmness slider all the way up to hottest setting. It simply blows out the vent. If I slide it back to about partially way it will blow out but not real hot....
1988 chevy silverado gear shift wont move...why?
I have a 1988 silverado with a 5.7 liter v8 and 700r4 nouns. The Shifter lever will go down though the gears easily, but will not come final up to put the truck in Park with the knob in the "run" position. I can't...
Best pickup for a 6 string hollow body guitar-'F' hole, piezo, condenser mic.,undersaddle transducer, other?
Would like to keep the accustic sound of the guitar and not an electric guitar sound. I also plan on purchasing an accustic amplifier. Anyone have experience with the stick on type pickups? Maybe more of a pain in the butt than their worth. The 'F' hole pickups in my opinion would make the guitar sound too "electric" and not accustic. Thanks for your opinions.
I don't like the pickups that ruin your soundhole period. The best sounds come from a double mic'd guitar, ( there is a tecnique for this if you do a little google research ). But I'm not really sure of your aplication here. If you do live work you might want to go with a piezo