Portable Sonar
Speakers, speakers or speaker systems are output devices of electrical signals through which they leave as sound. In fact, it is an electromechanical transducer, which is responsible for the quality of sound coming out. Speaker is a general term. You can include a set of speakers, a single device or a set of drivers, or speakers piezoelectrics. Speakers are variables and instruments are available in many sizes, shapes and qualities.
The accuracy of a speaker is one of the main concerns that we before selecting one. Some of the popular type of speakers and drivers are woofers, sub woofers, horn speakers, piezoelectric speakers, electrostatic speakers, speakers of magnetic tape and planner, bending wave speakers, flat speakers, distributed mode loudspeakers, speakers arc plasma and digital speakers.
The performance of a loudspeaker is measured based on their ability to reproduce a signal without distortion or deformation. Compared with other audio equipment, a loudspeaker is not too much. The frequency response of the amplifier may vary less than 0.1 dB, while for the speaker is about 3 dB and -3 dB from the ideal linearity.
Piezoelectric speakers are frequently used as beepers in watches and other electronic equipment. In less expensive systems Sound is used as tweeters. Examples of such devices are computers and portable devices. However, these uses are very large, due to its low cost.
Overload can not clog piezoelectric speaker, so you get an advantage over normal speakers. Overload can destroy the voice coil of a loudspeaker usual but that does not happen to the piezo. They have an inherently efficient electrical charge and therefore the need for an external crossover is less complex.
A major disadvantage is that its frequency response, most often, is quite poor compared to other prevailing technologies. The oscillation in drive capacitive loads can sometimes lead to distortion or damage to the amplifiers. This answers the question why piezoelectric speakers are used usually on a single frequency or non-critical applications.
There are special circumstances in which the piezoelectric speakers are used as input devices and output. Sonar is an example application. There is use to generate sound under water. This is the production version and the entry of the use is to act as part of detecting underwater microphones. They are very advantageous in this regard. In fact, its usefulness is much greater than that of tape-based instruments.
Pottery today is used as material for piezoelectric speakers. The compact size, actually helps to further miniaturization for PDAs, digital cameras, 3G mobile phones, and other household appliances. All standards use the magnet dynamic speakers for the function, while the compact size can reduce the thickness and weight. Weight loss can be up 30 to 50 percent. The use of energy will also be low, around half the original. This will be less costly in the long term.
About the Author:
Victor Epand is an expert consultant for music gear, speakers, and microphones. You can find the best marketplace for music gear, speakers, and microphones at these 3 sites: music gear, piezoelectric speakers, and microphone.
Article Source: ArticlesBase.com - Everything You Need To Know About Piezoelectric Speakers
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 100m Portable Sonar Sensor Fish Finder Alarm Transducer  US $42.99
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Humminbird 7400901 MHX XNPT Portable Mounting Hardware Kit List Price: $11.99 Sale Price: $10.51 Average Rating:   |
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This Hardware kit allows you to turn any unit with an XNT transducer into a portable transducer application. |
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Portable Sonar System - Gray (DF2200PX) List Price: $99.99 Sale Price: $97.99 |
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DF2200PX - Portable Sonar SystemFeatherweight Incredibly Easy Very Effective...The DF2200PX is the most versatile handheld depth sounder ever produced. Not only will this depth sounder give you instant depth readings from 2... |
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Portable Fish Finder with Round Sonar Sensor LCD display with LED back-lighting Sale Price: $69.99 |
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1) Depth Range Max/Min: 240Feet(75meters)/2Feet(0.7meters) 2) Transducer: Small round transducer with 7.5m cable 3) Display: Big Adjustable High-contrast Dot matrix FSTN LCD 128Vx64H 4) Display size: 41Wx48H 5) Back lighting: On/off White LED 6) Sonar Coverage: 45-degree beam angle, 200KHz Sonar Frequency 7) Temperature unit: Celsius/Fahrenheit 8) Power Requirement: 4-AAA alkaline Batteries 9) Removable float 10) Battery strength indicator 11) Levels sensitivity setting 12) Clear fish icon, fish alarm 13) User selectable meter or feet readings 14) Water Temperature Indicator 15) Able to shoot through boat hull and clear ice 16) Waterproof design: Level-4 (spray-water-proof) 17) Bottom contour: Show true changing of water bottom contour 18) Memory: Built-in memory stores sonar setting when the unit is turned off 19) Operational Temperature: -4F to 158F(-20C-70C) |
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Wireless Portable Fish Finder with Round Sonar Sensor LCD display with LED back-lighting List Price: $110.99 Sale Price: $145.20 |
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This Wireless Fish Finder is especially designed for fishermen and fishing enthusiasts, to search the Location of fish, Depth and Bottom Contour of water. Unlike with traditional wire/cable fish finder, you can tie your fish reel line to the front hole in the wireless transducer... |
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Portable Fish Finder with Round Sonar Sensor LCD display with LED back-lighting, Depth Locator Sale Price: $69.99 |
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This amazing product is designed specially for amateur and professional fishermen alike, to help them find the location of fish as well as the depth of water. This unit can be used in ocean, river, lake, and even on ice or icy water... |
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Humminbird 7700271 GCB Portable Gel-Cell Battery List Price: $19.99 Sale Price: Too low to display |
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Rechargeable Gel-Cell battery for portable units, works with 343c Portable and 383c Portable |
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Humminbird 4069001 PTC U Portable Case Conversion Kit List Price: $99.99 Sale Price: Too low to display Average Rating:  |
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Portable conversion kits provide a rugged protective case with internal battery compartments and all the hardware needed to convert your existing transducer to portable operation. This unit will work with all Matrix units(except 97), 500 series. |
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Portable Fish Finder And Depth Locator LCD display with LED back-lighting and Compass Sale Price: $69.99 |
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1) Display: TN/ANTI-UV LCD 2) Display size: 40Wx39H 3) Small round transducer with 7.5m cable,45-degree beam angle 4) Removable float 5) Back lighting: Green LED backlight 6) 4xAAA batteries, battery save mode, battery strength indicator 7) High/Low sensitivity setting 8) Depth Range Max/Min: 328Feet(100meters)/2Feet(0... |
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H22PX Portable Sonar System
$86.83 Norcross H22PX Portable Sonar System |
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Norcross / Norcross H22PX Portable Sonar System / H22PX
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Sonar
$14.96 Sonar |
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DF2200PX Portable Sonar System
$116.94 DF2200PX Portable Sonar System DF2200PX - Portable Sonar SystemFeatherweight, Incredibly Easy, Very Effective...The DF2200PX is the most versatile handheld depth sounder ever produced. Not only will this depth sounder give you instant depth readings, from 2.5 to 199 Feet (.7 to 60.1 Meters), in 1/10th precision, but at the press of a button the display will give real time temperature (water or air) and fish readings. Use it in the winter to shoot through ice before cutting your hole. Use it in the summer as a range finder and temperature meter while diving. Use it as a backup depth sounder on your pleasure boat or scan for channels in your dingy.No matter how you use it, the DF2200PX is the one piece of equipment you should never leave the dock without...SideScan™ Fish Detecting Sonar - There is no guessing where the drop-offs are or where the fish are hiding when you use the DF2200PX. One press of the button allows you to scan an area for drop-offs, ledges, or hiding fish within 199 Feet (61 Meters). Scan under weeds, lily pads, or even docks for trophy lunkers before making a cast; the presence of fish is clearly indicated on the LCD.60% More Powerful!Algorithmic Programming Reduces False ReadingsDepth Readings from 2.5 to 199 Ft (.7 to 60.1 Meters)Reads in English and MetricWaterproof, Maintenance Free ButtonInstant Depth Readings, 4 Times Per Second, in the Nearest 1/10th Foot or MeterSecure Battery Compartment for 4 x ‘AA’ Batteries with 30 Hours of Continuous UseWater or Air Temperature Readout to the Nearest 1/10th degrees F or CHigh Impact, Sure-Grip Rubberized HousingFish Indicator Pinpoints Hiding FishAutomatic Mode Allows Remote Viewing of ReadingsManual Mode Gives One Touch ReadingsShootThru™ Technology Allows Readings Through Ice or Boat HullsSoftGlow Backlit LCD DisplayWaterproof to 200 Ft (61 M) Depths for DivingFloatableWrist StrapCE Approved2 Year Warranty |
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Fisheries Sonar
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Lowrance X67C Ice Machine Portable Sonar System
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