Happy Puppy Vintage Computers

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Track List: DISC ONE: 1. Fortunato & Montresor - Imagine, 2. Elegia - Gaid One, 3. Time Modem - Astral, 4. Surge - Disappearing, 5. Strange Brew - Sky Life, 6. Silver Lining - Pearl Divers, 7. Two Right Wrongans - System,Error, 8. Byron Bogues - Lost Love, 9. Marzipan & Mustard - Spirit of Love, 10. Surge - Misere, DISC TWO: 1. Fresh Moods - Sky Never Die, 2. Sounds from the Ground - Triangle, 3. Aqua Bassing - Na Na's Waltz, 4. A.S.R. - Leviathan, 5. 4 Point - Down, 6. Interloper - Sertac, 7. Full Moon Fashions - Always 8 Am, 8. Eagles Prey - Feeling Warm, 9. Rank - Wacky Twatz, 10. Marzipan & Mustard - Pool.

01) Avalon - Peaks (3:44) ___ 02) Sounds From The Ground - Triangle (7:07) ___ 03) Solar Quest - Save The Whale (8:03) ___ 04) Time Modem - Promise Of Shadows (5:34) ___ 05) Moby - Hymn (3:18) ___ 06) Vegas Soul - Milano (5:39) ___ 07) World Of Chocolate - Time Is An Illusion (6:11) ___ 08) Steve Balters - Pictures In Rhythm (5:20) ___ 09) Tim Osgood - For You (7:01) ___ 10) Fortunato & Montresor - Imagine (6:03) ___ 11) Strange Brew - Sky Life (6:49) ___ 12) Unison - Unison (6:17) ___ 13) Tim Osgood - Mahalonovis (4:58)

MULTI-COMPONENT SUPPRESSION CIRCUITSEXCLUSIVE ISOLATED FILTER BANKS ELIMINATE INTERFERENCE BETWEEN COMPONENTSALL METAL HOUSINGWIDELY SPACED OUTLETS FOR TRANSFORMER PLUGSPROTECTION WIRING STATUS & FAULT WARNING LED INDICATORSLIGHTED POWER SWITCH CONFIRMS POWER ON/OFF STATUSLIFETIME PRODUCT WARRANTY$50000 ULTIMATE LIFETIME INSURANCE8 OUTLETS IN 4 ISOLATED FILTER BANKS3840 JOULES12-FT POWER CORDUPC : 037332010551Shipping Dimensions : 11.50in X 7.10in X 3.00inEstimated Shipping Weight : 3.5

TRIPP LITE TRIPP LITE ISOBAR 4 ULTRA - SURGE SUPPRESSOR ( EXTERNAL ) - 4 OUTPUT CONNECTOR(S

MULTI-COMPONENT SUPPRESSION CIRCUITSEXCLUSIVE ISOLATED FILTER BANKS ELIMINATE INTERFERENCE BETWEEN COMPONENTSALL METAL HOUSINGWIDELY SPACED OUTLETS FOR TRANSFORMER PLUGSPROTECTION WIRING STATUS & FAULT WARNING LED INDICATORSLIGHTED POWER SWITCH CONFIRMS POWER ON/OFF STATUSLIFETIME PRODUCT WARRANTY$50000 ULTIMATE LIFETIME INSURANCE6 OUTLETS IN 3 ISOLATED FILTER BANKS3330 JOULES6-FT POWER CORDUPC : 037332010544Shipping Dimensions : 11.50in X 7.00in X 3.00inEstimated Shipping Weight : 2.925

Ooma VOIP Telo offers VOIP service for those homes that have access to DSL - Cable - Broadband Internet Service. Using VOIP (Voice Over Internet Protocol) and an optional Ooma Handset you can make phone calls across the United States for virtually free. International calls cost pennies. The base station interprets calls from the handset to your Internet service and calls are transmitted over Internet service protocols and connections. With its sleek design and loaded features, the only thing that's not high-end about the Ooma Telo is the price tag. The Ooma Telo connects to your high-speed Internet and existing home phones, allowing you to enjoy free home phone service, free US calls, and exceptionally low international rates. Easy set-up - Ooma is a highly intuitive set-up. Most customers are up and making free calls in about 15 minutes. 911 Service - When you dial 911, emergency personnel will automatically have your registered address. Landline Backup Option - Be backed up during power outages or Internet outages to make 911 calls if you also choose to keep a landline connected to your Ooma Telo. Low cost international calling - Make international calls starting at pennies per minute. My Ooma - Hear messages, check call logs and control your preferences online. Online call log - Check your calling history from any Internet-connected computer or mobile device. Free in-network calling - Call another Ooma customer anywhere in the world for free. Dect 6.0 Support for Ooma Telo Handset - Get superb sound quality, security and range without interfering with your Wi-Fi network or other home electronics. Advanced network/firewall configuration - Get a high-performance firewall router, with QoS support, that allows you to setup home-based servers and other network devices.

The Ooma Telo is a revolutionary device that allows you to call anywhere in the U.S. for free. Just pay applicable taxes and fees. You can also make international calls for next to nothing. Telo is easy to set up and even easier to use. You simply connect the device to your high-speed Internet and your existing phone, and that's it. You don't need a computer, and you don't need a headset. With the Ooma Telo, you'll be ready to start calling and saving money within minutes. NOTE: The Ooma Telo requires high-speed Internet and a router (sold separately). Overview Your one-time purchase of the ooma system delivers: Free calling within U.S. and low-cost international calls Caller-ID, call-waiting and 911 Outstanding voice quality and secure, encrypted phone calls Easy set-up with any telephone; no PC required Option to keep your current number and landline service 30-day money-back guarantee and extendable 1-year warranty Free trial of Ooma Premier -- a suite of enhanced features Features Call anywhere in the U.S., free of charge Free Calls in the U.S. and Low International Rates With its sleek design and loaded features, the only thing that's not stunning about the Ooma Telo is the price tag. The Ooma Telo allows you to enjoy free home phone service, free calls within the United States, and exceptionally low international rates. The end result: you'll save hundreds of dollars a year in phone bills. Crisp, Clear Voice Quality with No Dropped Calls The Ooma system has been designed to deliver exceptional voice quality and reliability, giving you the crisp, acoustic performance of a landline. You can get your ooma phone serviceup and running in a mere 20 minutes.View larger Easy Installation with your Existing Phones The Telo has been designed for an intuitive and easy installation. It connects to your router with the included Ethernet cable, and to your existing telephone with the included telephone cord. Most customers are connected and making calls within about 20 minutes. If you've got any questions, ooma's online support site is loaded with dozens of articles, diagrams, tips, and facts. By replacing your landline with Ooma, you could save a bundle. Port Your Existing Phone Number For a one-time fee of $39.99, Ooma gives you the option of retaining your current telephone number. Or, if you want to change numbers, you can choose a new number in any calling area in the US to use with your Telo unit. Low-Cost Landline Option for Added Flexibility Ooma gives you the option of integrating a low-cost landline as a backup. This way, you'll be able to enjoy the assurance of traditional 911 service and seamless coverage during Internet and power outages. Supports the Ooma Telo Handset Get the most out of your Ooma Telo with the official Ooma Telo Handset. Thanks to DECT 6.0 technology, the handset enhances the already clear, crisp sound quality of ooma. It allows you to take full advantage of Ooma's premium features like Instant Second Line and personal number setting. You don't need a Telo Handset to use Ooma, but it will definitely enhance your experience. My Ooma gives you unrestricted access to your account and phone service. Exclusive Web Portal My Ooma is your online destination for the ooma service. You can listen to messages, check your call logs, control your account preferences, prepay for international calling, and even set up voicemail notifications, 24 hours a day. There's also an online phonebook, which can be accessed if you're using the Ooma Telo Handset (sold separately). What's in the Box Ooma Telo, Ethernet cable, phone cable, and AC adapter. PureVoice In today’s connected home environment with Internet file sharing, video streaming, on-line gaming, Ooma’s PureVoice Technology delivers clear audio even if substandard calling conditions exist. Ooma PureVoice Technology is composed of four key components. Advanced Voice Compression Ooma uses an advanced voice compression algorithm that reduces bandwidth consumption by 60% over standard VoIP technology. That leaves you with more bandwidth for all other online activities and increases the likelihood that your voice traffic will be delivered properly by your ISP. Wire-speed QoS Even though Ooma uses only a fraction of the bandwidth of standard VoIP technology, preserving voice quality requires that those packets arrive on time. The Ooma Telo prioritizes voice packets without slowing down the rest of your network. This way you can enjoy crystal clear calls even as you're uploading your latest video clips. Adaptive Redundancy Packet loss is the enemy of VoIP - it can cause voice to sound stuttered or garbled. The Ooma Telo detects packet loss on your Internet connection and automatically sends redundant packets to boost the clarity of your phone call. Encrypted Calls Ooma takes your privacy seriously. We use the same encryption technology governments use to protect classified data to protect your conversations. This makes Ooma even more secure than the traditional landline. Discover Ooma Premier If you want to add a bundle of enhanced calling features that will get your home phone service firing on all cylinders, Ooma Telo includes a free 60-day trial to Ooma Premier, a suite of enhanced calling features. You can also add Ooma Premier to your service for $9.99/month or $119.99/year. If you sign up for a year, you'll have the option of retaining your current telephone number for free ($39.99 value), or receiving a free HD handset ($49.99 value). See the chart below for a full list of Ooma Premier features. ooma Premier Subscription Features: Advanced Voicemail Options for voicemail forwarding and added privacy Instant Second Line for large households with busy phone lines Personal Numbers for all family members so you'll always know who a call is for Call Blocking and Community Blacklist to help rid yourself of persistent telemarketers Multi-ring, which lets you forward your calls to your cell phone or any other phone you choose Three-way Conference Calls so that you can easily add a third person to your calls And much, much more. Advanced Voicemail Features With Ooma Premier, you'll have access to several first-class voicemail options. You'll be able to enjoy the ultimate convenience of having your voicemails forwarded to e-mail, allowing you to check your phone messages from work. And for added privacy, you'll have the option of making any Ooma device a private extension. Instant Second Line If you share your house with a phone hog, Ooma's Instant Second Line feature presents a solution for you. When the line is already in use, you can simply pick up a second Ooma Handset and get a fresh dial tone. Up to two separate calls can be made simultaneously. Program unique numbers and ring sounds for everyone in the family. Personal Number With an affordable Ooma Premier subscription, you gain access to the Personal Number feature. This feature allows you to create a unique phone number for everyone in the family. Multiple numbers can be mapped to the same handset, but you can make each number ring distinctively so you know who the call is for. Up to nine additional numbers are allowed. Add Unwanted Callers to Your Blacklist Ooma allows you to instantly add unwanted callers to your blocked list. If telemarketers are harassing you, use ooma Lounge to add them to your blacklist. You'll have the option to block future calls completely or send them straight to voicemail. The choice is yours. Blacklist unwanted callers with Ooma Premier. Community Blacklist Harness the power of the Ooma community and protect yourself from unwanted callers before they've even tried to call you. If enough Ooma users have blocked a certain caller, Ooma will add this caller to the community blacklist. Combine this with Ooma's special spam-detecting algorithms, and you've got the ultimate telemarketer blacklist. Multi-Ring Constantly on the go? Multi-Ring takes call forwarding to the next level. Configure your Ooma number to simultaneously ring your home phone and mobile phone at the same time. Whether you're at home or on the road, you'll never miss a call. Three-way Conference Calls Need to make dinner plans with two of your friends? Ooma's got you covered. Once you're on a call, press the second-line button to make or take a second call. Press down both line buttons at once, and you've got yourself a conference call.

The TrendNet TFM-561U USB Fax Modem connects computers to the Internet using a dial up telephone connection. This compact fax modem offers advanced communications functionality, compati-bility with Windows and Linux operating systems, and compliance with most dial up Internet Service Provider networks.

Complete, convenient and customizable, it's everything a tablet can and should be, with features you can personalize, plus speedy performance so you can multitask your way through your digital life (and favorite entertainment) with ease. The Toshiba PDA01U-00501F Thrive 10" Tablet features a spacious 10.1" diagonal high-res multi-touch widescreen display, and is powered by NVIDIA® Tegra™ 2, the world's first mobile superchip. So this tablet makes it easier to do the things you want to do—in brilliant high-definition. Powered by Android™ 3.1, Honeycomb, a platform specifically designed and optimized for tablets, this super light device also dishes out a lightning-fast Web experience, with accelerated Adobe® Flash® support and unchained access to the Android Market™. Cameras front and rear let you take photos and videos, and video chat from wherever you are.

Introducing the Thrive Tablet by Toshiba, powered by Android 3.1 (Honeycomb), offering a better way to browse the web, enjoy e-books and HD videos, play games, listen to music and more. Complete, convenient and customizable, it's everything a tablet can and should be, with a gorgeous 10.1-inch diagonal high-res multi-touch widescreen display, features you can personalize and speedy performance so you can multitask your way through your digital life (and favorite entertainment) with ease. The Toshiba Thrive Tablet featuring the power of Android 3.1 and the NVIDIA Tegra 2 mobile processor (see larger image). Your Entertainment Hub The Thrive tablet lets you enjoy and organize all your favorite music and videos in one convenient, portable place. Rock out on the go using its stereo speakers with Toshiba sound enhancements or built-in headphone jack--or plug in to our convenient Toshiba Multi-Dock (sold separately) to connect your own sound system. Use its built-in HDMI port to watch your videos on any compatible HD display. And thanks to our preloaded Toshiba Media Player, keeping your collection organized is easier than ever. With Adaptive Display technology, the 10.1-inch HD display looks great anywhere--even in direct sunlight (see larger image). The pre-loaded PrinterShare application makes it easy to connect to a printer over a wireless network (see larger image). Brilliant Clarity Give all those movies a makeover with Resolution+ video enhancement technology--Toshiba's exclusive innovation that instantly improves sharpness and color on standard-definition content, for visuals that look and feel more like HD. Toshiba's Adaptive Display technology ensures that you get the best visual experience, automatically adjusting the display's brightness and color to the lighting environment--making it readable even on the sunniest parts of the patio. Plus, you can use the tablet's built-in HDMI port to share your favorite videos on any compatible HDTV. Accelerated Everything Offering serious horsepower for its size, the Thrive tablet is powered by the world's first mobile super-chip, NVIDIA Tegra 2. Enjoy extreme multi-tasking with the first mobile dual-core processor, plus hardware-accelerated Adobe Flash and console-quality gaming with visuals powered by NVIDIA GeForce--so you can enjoy your favorite games, thrill to high-def video and much more. Android 3.1, Honeycomb Operating System Smile. Because this tablet quite simply delivers everything on the Android platform. It's founded on the tablet-optimized Android 3.1 (a.k.a., Honeycomb), designed from the ground up to improve your experience with devices just like this. Dual Front and Back Cameras The Thrive tablet gives you plenty of options with two onboard cameras. Use its convenient 2-MP front webcam and built-in microphone to video-chat with clarity, while its 5-MP auto-focus rear camera lets you capture photos and video in beautiful high-definition (HD 720p). Easy Grip Finish Now it's easier than ever to get a grip on your fast-paced mobile life--and grab some well-earned attention, too. This slip-resistant, rubberized surface is comfortable to hold, so you'll never miss a beat when chatting or emailing on the run. It's also available in your choice of six vibrant colors (sold separately), making it easy to personalize the look of your tablet. Tons of Connectivity Options Feel free to transfer and share files with your other gear and many of today's most popular gadgets, courtesy of USB 2.0, mini USB, and HDMI ports on your Thrive tablet. Plus you can use its full-size SD card slot to easily view photos and movies, or connect wirelessly to any compatible device with built-in Wi-Fi and Bluetooth. Specifications Display 10.1-inch LED-backlit capacitive multi-touch display (1280 x 800 pixels; 16:10 aspect ratio) Processor & Graphics 1 GHz NVIDIA Tegra 2 dual-core mobile processor with GeForce graphics Storage 8 GB internal flash memory Memory 1 GB internal DDR2 memory Wireless Wireless-N Wi-Fi networking (802.11b/g/n) plus Bluetooth 3.0 Audio Built-in stereo speakers with SRS Premium Voice Suite Weight and Dimensions 1.6 pounds; 10.75 x 0.62 x 6.97 inches (WxDxH) Sensors & Location GPS, gyroscope, accelerometer, ambient light sensor, digital compass Multimedia Playback Adobe Flash support Audio compatibility: MP3, WMA, AAC, eAAC+, Ogg Vorbis, WAVE Video compatibility: MPEG4, H.263, H.264 Ports & Expansion HDMI port (full-sized) for 720p video output 2 USB ports (1 full-sized, 1 mini-USB) Dock connector port 3.5mm stereo headphone jack Secure Digital (SD) card slot, compatible with SD, SDHC, and SDXC media See larger image. To learn more about Toshiba products, visit the Amazon.com Toshiba Store. Toshiba Thrive Accessories Toshiba Thrive Back Cover: Personalize your Thrive Tablet with a user-interchangeable rubberized back cover available in your choice of five vibrant colors: Silver Sky, Blue Moon, Green Apple, Raspberry Fusion, and Lavender Bliss Toshiba Thrive Battery Pack: Unlike other tablets, the Thrive Tablet battery is user-replaceable--no need to send it back to the manufacturer to be replaced. Simply remove the back cover and switch it out in seconds. Toshiba Thrive Global AC Adapter: A second AC adapter for your Thrive Tablet--at home and/or at work--makes power access convenient and tailored to your needs Toshiba Thrive Multi-Dock Docking Station: Store, view and charge your Toshiba Tablet--quickly and conveniently--with a customized Thrive Tablet dock featuring two USB ports as well as a HDMI output for connecting to a compatible HD monitor or HDTV Toshiba Thrive Standard Docking Station: Keep your Thrive Tablet safe and secure while optimizing everyday productivity. This standard docking station includes a USB port plus audio output

A popular and affordable telephone, the 210 from AT&T is designed for those who don't want hassles or frills, just a basic phone that's reliable and easy to use. Simple corded operation means you never have worry about misplacing a cordless handset, and the phone's sturdy construction means it's designed to last. You can place the base on a convenient surface or easily mount it on the wall, saving on counter space. A 12-number memory dial feature lets you store your most frequently called numbers (up to 21 digits)--nine speed dials plus three emergency one-touch dials that are easy to program. A directory card is provided to help you keep track of all your memory dial settings. A redial feature lets you quickly call the last outgoing number (up to 32 digits). Three ringer settings (off, low, and high) and three handset volume levels permit customization. Switchable tone and pulse dialing methods are also provided. The illuminated keypad helps you operate the phone even in darkly lit areas, while a prog/mute button on the handset lets you hear the other party while muting your side of the conversation. An excellent value, the 210 also comes backed with a one-year limited warranty. What's in the BoxTelephone handset, telephone base, 7-foot line cord, coiled handset cord, user's manual, warranty information

The AT&T 210 trimline telephone is designed for hassle free use. This durable corded phone features a three ringer setting, tone/pulse dial and illuminated keypad. The 210 offers a 10 number memory dial which allows you to store your most important contacts. A directory card is also provided to help you keep track of all your memory dial settings. 210 Features: Trimline Corded Phone Single Line Operation Hearing Aid Compatible Wall Mountable Backlit Keypad 3 One-Touch Memory Buttons 10 Station Speed Dial Handset Volume Control Redial Mute Flash No Power Adapter Required

Mediabridge Tri-Shielded Coaxial Digital Audio Video CablesThese coaxial audio/video cables are made with RG6 cable and feature two male F-type connectors housing a copper center conductor, dielectric insulation, aluminum foil shielding, braided aluminum shielding, and another layer of aluminum foil shielding. The Easy Grip Connector Caps are used to easily tighten the connectors by hand rather than using a wrench. Intended Use Cable Box, TV, Satellite TV, VCR, Cable Modem, Off-Air Antenna etc.

Amazon.com Product Description A four-line corded phone with multi-user expandability to 16 stations, the 945 is a great choice for small businesses and busy households alike. A built-in speakerphone and headset compatibility allow you to communicate while engaging in other tasks, and two data ports allow you to take advantage of peripherals such as a modem or fax machine. A 32-number speed dial lets you easily call the most important numbers, while features such as call transfer and three-party conferencing allow you to manage incoming calls. Additionally, an intercom feature lets you talk with any of the other phones on your system. The 945 works with any AT&T model 974, 984, 944, 955, and 964 phones, so you can mix and match to suit your office's needs. You can adjust speakerphone, headset, and ringer volume levels, and also choose between several ringer types. The 945 has a six-number redial, while mute, hold, and flash buttons provide additional functionality. With the base LCD screen, you can access your phone's settings, and a memory loss protection feature saves your settings in case of a power failure. The 945 comes backed with a one-year limited warranty. What's in the Box User's manual, two 7-foot line cords, one 8-inch line cord, handset, base unit, coiled handset cord, power adapter

AT&T 4-Line Phone Basic AT&T 4-Line Phone Basic Features: Four-line expandablecorded telephone The ATT945 replaces the ATT944 ATT945 is compatible with the ATT974, ATT984, and the older models, ATT944/955/964 Speakerphone 1 to 4 line capability Intercom Page Expandable up to 16 stations (the maximum number of stations is 12 if one of the ATT944,955, or 964 is attached to the system) 2 Dataports Easy to install 3 Party conferencing (inside or outside lines, or a combination) Call transfer 32# Speed dial and 16 intercom number locations (can be used for one-touch memory, two-touch memory, and direct station dialing) Power failure protection for all 4 lines Individual station paging (intercom) or system-wide paging Headset jack 4-Line backlit LCD display Redial/hold/mute/flash Last 6 number redial Volume control for receiver, speakerphone, headset, ringer Do not disturb Wall Mountable Auto line selection Display dial Headset jack (2.5mm) Chain dialing Rapidscroll navigation pad Memory loss protection Programmable pause Selectable ringer tones Hearing aid compatible 9V battery required for programming, not included Titanium blue (dark gray blue)

Super fun toy guitar with all the digital bells and whistles. Appears to be the girls model since it's designed with a double guitar arm in pink and metallic pink buttons on a gray body. Features include Demo, Sound Effects, Percussion buttons. Change music rhythms from Pop to Rap, Funk, Hip-Hop or Rock. Center Sound Mixer Panel lights up to the beat of the music. Kids will love it!

Platform Technology Intel Centrino 2 System Type Notebook Built-in Devices Stereo speakers, wireless LAN antenna, ThinkLight, Bluetooth antenna Embedded Security Trusted Platform Module (TPM 1.2) Security Chip , fingerprint reader Processor Intel Core 2 Duo P8400 / 2.26 GHz ( Dual-Core ) Cache Memory3 MB - L2 cache RAM 4 GB (installed) / 4 GB (max) - DDR3 SDRAM - 1066 MHz - PC3-8500 Hard Drive160 GB - Serial ATA-150 - 5400 rpm Optical Storage CD-RW / DVD-ROM combo - removable plug-in module Display14.1" TFT 1280 x 800 ( WXGA ) - 24-bit (16.7 million colors) Graphics Controller Intel GMA 4500MHD Dynamic Video Memory Technology 5.0 Audio Output Sound card Telecom Fax / modem - 56 Kbps Networking Network adapter - Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, Bluetooth 2.1 Input Device Keyboard, TrackPoint, UltraNav Power AC 120/230 V ( 50/60 Hz ) Battery Lithium ion Environmental Standards ENERGY STAR Qualified , EPEAT Gold Expansion / Connectivity Expansion Bays1 x Ultrabay Enhanced Expansion Slots Total (Free)1 ( 1 ) x Express Card/54 2 memory - SO DIMM 204-pin Interfaces3 x Hi-Speed USB - 4 pin USB Type A 1 x display / video - VGA - 15 pin HD D-Sub (HD-15) 1 x modem - phone line - RJ-11 1 x network - Ethernet 10Base-T/100Base-TX/1000Base-T - RJ-45 1 x IEEE 1394 (FireWire) - 4 pin FireWire 1 x docking / port replicator 1 x headphones - output - mini-phone stereo 3.5 mm 1 x microphone - input - mini-phone 3.5 mm Other Features Security lock slot (cable lock sold separately), administrator password, hard drive password, power-on password, ThinkVantage Active Protection System, ThinkPad Roll Cage Compliant Standards CE, MPR II, BSMI, GOST, cUL, MPR III, NOM, SASO, VCCI-II, UL 60950, CB, FCC Part 15 B, CER, CCC, MIC, RoHS Dimensions (WxDxH) 13.2 in x 9.4 in x 1.4 in Weight 5.1 lbs

An underwater piezoelectric directional transducer prototype, to be used in underwater acoustic networks, combines different vibration modes of a cylinder to synthesize desired beam patterns. Performance is evaluated in an anechoic water tank, with reference hydrophones and a signal analyzer capable of Fast Fourier Transform (FFT) data processing. An impulse technique is used for measuring impedance, admittance, Transmitted Voltage Response (TVR), Receiving Voltage Sensitivity (RVS), and horizontal and vertical beam patterns. In this technique, a single-cycle tone burst is emitted at a low frequency repetition rate and excites the driving transducer. The signal analyzer excludes the acoustic reverberations from the tank walls by adequate adjusting of the FFT sampling window. Additionally, for beam-pattern data acquisition, a computer simultaneously samples the azimuthal orientation of the prototype relative to a reference hydrophone and the corresponding frequency response, as the evaluated transducer continuously rotates. The FFT capability of the signal analyzer also supports intrinsic noise evaluation. The results show that the new transducer architecture is capable of producing directional beam patterns according to the present operational requirements by electronic control of the internal electrode applied voltage distribution.

An underwater piezoelectric directional transducer prototype, to be used in underwater acoustic networks, combines different vibration modes of a cylinder to synthesize desired beam patterns. Performance is evaluated in an anechoic water tank, with reference hydrophones and a signal analyzer capable of Fast Fourier Transform (FFT) data processing. An impulse technique is used for measuring impedance, admittance, Transmitted Voltage Response (TVR), Receiving Voltage Sensitivity (RVS), and horizontal and vertical beam patterns. In this technique, a single-cycle tone burst is emitted at a low frequency repetition rate and excites the driving transducer. The signal analyzer excludes the acoustic reverberations from the tank walls by adequate adjusting of the FFT sampling window. Additionally, for beam-pattern data acquisition, a computer simultaneously samples the azimuthal orientation of the prototype relative to a reference hydrophone and the corresponding frequency response, as the evaluated transducer continuously rotates. The FFT capability of the signal analyzer also supports intrinsic noise evaluation. The results show that the new transducer architecture is capable of producing directional beam patterns according to the present operational requirements by electronic control of the internal electrode applied voltage distribution.