美国PCB公司 http://www.pcb.com/

shxsha

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<TD width=500>PCB Piezotronics was founded in 1967 as a manufacturer of piezoelectric quartz sensors, accelerometers, and associated electronics for the measurement of dynamic pressure, force, and vibration. The unique expertise of the company was the incorporation of microelectronic signal conditioning circuitry within these sensors to make them easier to use and more environmentally compatible. These ICP&reg; sensors gained wide popularity and became the foundation for the company's success. </TD></TR>
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<TD width=500>Subsequent growth and steady investment in facilities, machinery, and equipment permitted a constant broadening of the product offering. Measurement capabilities expanded with the addition of piezoceramic, tourmaline, capacitive, piezoresistive, and strain gage sensing technologies. Ensuing products include industrial accelerometers, DC accelerometers, load cells, torque sensors, microphones, pressure transmitters, and calibration equipment. </TD></TR>
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<TD width=500>The backbone of the company is its mission statement: Total Customer Satisfaction. This mission is not only supported by products that offer great value, but also by an unconditional warranty. Factory applications engineering and a worldwide network of sales offices and representatives are readily available to assist with customer requests. </TD></TR></TABLE><br><STRONG>For more details, please contact:<br>PCB Piezotronics,Inc.Shanghai Representative Office <br>021-63741517/021-63741513</STRONG><br>

[此贴子已经被作者于2006-1-4 10:22:42编辑过]

shxsha

In 1981, Larson Davis began developing, manufacturing, and marketing precision acoustics and vibration instrumentation. Located in Provo, Utah, Larson Davis is a company dedicated to the advancement of acoustics and vibration measurement technologies. Today, Larson Davis invests significantly in technological research, product development, and marketing strategies, and currently holds a number of patents for unique advancements over existing technologies in the market.<br>The acoustics and vibration products are focused on precision measurement instruments for use in a variety of industries. These products combine very sophisticated environmental data collection systems with high-speed data acquisition and processing systems to give users critical information concerning acoustical or vibration based events. Larson Davis' customers include major corporations in a variety of industries, including automobile manufacturers, aircraft manufacturers, and defense contractors, and the United States military. Subdivisions of this market in which Larson Davis' instrumentation is currently being utilized:<br><br>Environmental Monitoring provides data used to monitor, control, or avoid noise (unwanted and/or irritable sound which has a detrimental effect on living organisms). It includes such applications as community noise ordinance compliance surveys, vehicle passby surveys, industrial complex perimeter monitoring, environmental impact studies, OSHA (noise in the work place) mandated surveys, military aircraft sonic boom monitoring, and others.<br><br>Product Design and Improvement encompasses the use by manufacturers to optimize performance and minimize acoustic output. For example, the auto and aircraft industries determine noise dampening properties of materials used in insulation; a yacht manufacturer studied acoustic spectrums as an aid in selecting efficient hull designs; and other manufacturers of items such as lawn mowers, computer printers, office equipment, and kitchen appliances employ the instruments to collect information on sound emissions to aid in encasement design.<br><br>Structural Dynamics is the study of the motion of materials to determine characteristics such as fatigue, resonance, material density, and bonding strengths. For instance, a consultant used Larson Davis' instrumentation to determine the resonant frequency of the vibrations in the Statue of Liberty's arm holding the torch. Braces were designed and installed which resulted in doubling the torch bulb life.<br><br>Medical Applications include hardware and software used in automatic calibration systems for medical equipment. The analysis and treatment of both hearing and speech problems can be improved utilizing the Company's instrumentation.<br><br>Professional Sound includes both manufacturers and consultants. The Company provides equipment used to certify compliance by sound products (such as amplifiers, mixers, equalizers, speakers, and microphones) with published specifications. Field engineers rely on portable instrumentation to evaluate the acoustic characteristics of a room or building.<br><br>Defense and Government applications range from ship/vehicle identification based on spectrum analysis to artillery blast noise studies.<br><br>As part of its ongoing research and development efforts, Larson Davis continues to upgrade and refine its existing products in the acoustic and vibration market and develop new products.<br><br><STRONG>For more details, please contact:</STRONG><br><STRONG>PCB Piezotronics,Inc.Shanghai Representative Office <br>021-63741517/021-63741513</STRONG>

[此贴子已经被作者于2006-1-4 10:23:08编辑过]

@happy@

美国PCB的传声器之类的设备很不错吧，听说过
不过市场上不好找啊，多是什么德国的

jojohup33

pcb的东西一般般，好像是贴牌的。而且pcb的代理商基本上不懂技术