REVIEWED SITES 
| APC International, Ltd.
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A manufacturer of piezoelectric ceramics and piezoelectric products for customers in aerospace, automotive, consumer, engineering and design, industrial, manufacturing, medical products, military. URL: http://www.americanpiezo.com
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| Beijing Dongfang Jinrong Ultrasonic Electrical Equipment Co.,Ltd.
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A manufacturer of ultrasonic equipment producing piezoelectric ceramic transducers and ultrasonic devices. URL: http://www.chinapiezoceramic.com
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| Britek SA, Inc.
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A line of ultrasonic transducers specialize in thickness gauge, flaw detection, nuclear transducers, and custom built transducers. URL: http://www.briteksa.com/
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| Changzhou Union Electronics
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Manufacturers of buzzers and speakers used in computer modems, mobile phones, cordless phones and pagers. URL: http://www.china-buzzer.com
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| Changzhou Xichun Electronics Co., Ltd.
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Manufacturer of buzzers and electronic acoustical components. Product photos and specifications. URL: http://www.xichun-buzzer.com/
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| Chintele Quartz Technology Co Ltd
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A Chinese manufacturer of piezoelectric quartz, quartz products and single crystal optical products for use in the telecommunications and general time and frequency industries. URL: http://www.chintele.com
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| Eleceram Technology Co. Ltd.
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Manufacturer of piezoelectric ceramics, piezoelectric transformers and ultrasonic transducers. Includes product data sheets and company news. URL: http://www.eleceram.com.tw/
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| Guangzhou Sound-Tech Electronic Co., Ltd
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Manufacturer of piezo ceramic electroacoustic products such as buzzers, ringers, alarms and transmitter/receivers. URL: http://www.sound-tech.com.cn/indexe.html
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| Hanics
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Manufacturer of microphones and speaker units for communication and audio products. URL: http://www.hanics.com/
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| JL World Corporation Ltd
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Manufacturer of sound generators and microphones. URL: http://www.jlworld.com/
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| Kaili Electrionic Factory
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Manufacturers of buzzers, plug and jack, audio/video cables, fuse box. From China. URL: http://www.kaili-buzzer.com/
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| Lubell Labs Inc.
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Manufacturer of underwater loudspeakers, underwater speakers, and piezoelectric underwater audio transducers. URL: http://www.lubell.com/
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| Massa
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Designer and manufacturer of electroacoustic products including sensors, transducers, and ultrasonics. URL: http://www.massa.com
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| Myntahl Corp.
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Manufacturer of buzzer, alarm, piezo alarm, electronic buzzers, alarm annunciator, siren, magnetic alarm transducers and external-driven piezo. URL: http://www.myntahl.com/
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| Ningbo East Electronics
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Chinese Manufacturer of piezo ceramic electroacoustic products such as buzzers, ringers, alarms, transmitter and receivers. URL: http://www.east-mingtao.com/
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| Ormal Electronics Limited
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Offers piezoelectric cable sensors for impact sensing, acoustic transducers and perimeter security. URL: http://www.ormal.co.uk
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| Shianlin Electronic Co., Ltd.
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Manufacturer of piezo transducers, chips and powder. From Tiawain. URL: http://www.sunnytec.com.tw/
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| SPL Ltd.
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Manufacturer of buzzers, transducers, speakers, receivers, microphones, ultrasonic sensors, connectors, cable assemblies, wire harness. Factories are located in China. URL: http://www.spl-hk.com.hk
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| Suzhou Sonavox Electronics Co.,Ltd.
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A manufacturer of speakers. Application areas include, car audio, TV and home theater. URL: http://www.ypage.com/sonavox
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| Tibbetts Industries, Inc.
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Developer and manufacturer of miniature electromagnetic and electro-acoustical transducers typically used by the hearing aid, medical device, and security industry. URL: http://www.tibbettsinc.com/
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| Union Enterprise Co
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Piezo buzzer and element for all kinds of alarm, home appliances and security system. URL: http://www.unionetrade.com/
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| Unique Sound Co., Ltd.
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Specialist manufacturer of SMD audio transducers. URL: http://www.unique-sound.co.kr
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| Wisdom Plus Sdn Bhd
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Manufacturer of buzzers and telephone ringers. URL: http://www.wisdomplus.com
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