丹麥G.R.A.S. Sound & Vibration  www.gras.com.cn  www.gras.dk
　丹麥G.R.A.S.公司是——貢納·拉斯穆森先生(Gunnar Rasmussen)于1994年創(chuàng)立的個(gè)人全資公司。公司總部位于霍特(Holte)，距丹麥?zhǔn)锥几绫竟幸员奔s二十公里。公司產(chǎn)品主要為：聲學(xué)采集前端如傳聲器、前置放大器以及電信號調(diào)節(jié)適配器。貢納·拉斯穆森先生因其對噪聲及振動(dòng)測量儀器發(fā)展的卓越貢獻(xiàn)而享譽(yù)世界。在其從業(yè)五十多年的時(shí)間里，他開發(fā)了大量的對于業(yè)界至關(guān)重要的產(chǎn)品，例如現(xiàn)代的測量傳聲器、聲級計(jì)、聲強(qiáng)探頭、三角剪切式加速度計(jì)以及其他許多產(chǎn)品。同時(shí)，他還從事于有關(guān)精密的自由場或壓力場的互易校準(zhǔn)，活塞發(fā)聲器和激光校準(zhǔn)等工作。
產(chǎn)品范圍 
　　丹麥G.R.A.S.公司專注于聲學(xué)采集前端產(chǎn)品的研發(fā)和生產(chǎn)，面向要求日益嚴(yán)格的高可靠度精密測量活動(dòng)，丹麥G.R.A.S.公司為您提供全方位的產(chǎn)品。目前已涵蓋了從換能器到輸入端模/數(shù)轉(zhuǎn)換器、聲學(xué)信號記錄等所有類型的產(chǎn)品。其中儀器類的主線產(chǎn)品是根據(jù)國際標(biāo)準(zhǔn)設(shè)計(jì)和制造，大量系列化的標(biāo)準(zhǔn)測量傳聲器和前置放大器。而對于一些特殊的應(yīng)用場合，丹麥G.R.A.S.公司還為您提供一系列的特殊換能器和附件配件等，例如：聲強(qiáng)傳聲器、仿真耳、耳和仿真嘴、電話測試設(shè)備、人頭及軀干模擬器、活塞發(fā)聲器和校準(zhǔn)器等。
質(zhì)量保證 
　　丹麥G.R.A.S.公司出品的傳聲器均由：不銹鋼材質(zhì)的保護(hù)柵罩及外殼，特殊不銹鋼合金材質(zhì)的振膜（為保證產(chǎn)品長期工作穩(wěn)定可靠而特制）經(jīng)過精確加工組裝而成。我們生產(chǎn)的高精度1級測量傳聲器，在交付后均能提供5年期的，因材料和工藝缺陷造成產(chǎn)品損壞的質(zhì)量保證。
　　對其他儀器和產(chǎn)品，除了另有規(guī)定的之外，我們均提供2年期的，因材料和工藝缺陷造成產(chǎn)品損壞的質(zhì)量保證。除上述原因提供質(zhì)保以外，對于那些由于使用者疏忽、錯(cuò)接電源、錯(cuò)接設(shè)備等造成的損壞，以及電池及其他易損消耗件等均不在質(zhì)保范圍之內(nèi)。
產(chǎn)品改進(jìn) 
　　丹麥G.R.A.S.公司將持續(xù)不斷地改善自身產(chǎn)品的性能，可能不經(jīng)通告即變更產(chǎn)品的外觀及規(guī)格，敬請各位用戶諒解。如需了解產(chǎn)品最新詳情敬請垂詢我們。
G.R.A.S. Sound & Vibration was founded in 1994 by Gunnar Rasmussen and is a 100% privately owned company. The company is located in Holte, Denmark, 20 km north of Copenhagen and produces acoustic front-end products such as microphones, preamplifiers and signal conditioning devices. Gunnar Rasmussen is well known for his numerous contributions to the development of noise and vibration measurement instrumentation. For more than 50 years in the industry he has developed a number of key products such as modern measurement microphones, sound level meters, sound intensity probes, delta shear accelerometers and many others. He has also worked with precision, free-field and pressure reciprocity calibrations, as well as pistonphone and laser calibrations.

 
Product range
The company has concentrated its efforts and expertise on the development and production of front-end acoustic products. This includes in principle all products necessary for the precise and reliable measurement, and recording of acoustic signals, from the transducer to the input of the A/D converter. The main line of instrumentation includes a broad range of standard measurement microphones and preamplifiers, all designed and manufactured in accordance with international standards. These are complemented by a wide range of more specialised transducers and accessories for more specific applications such as sound intensity microphones, artificial ears, ear and mouth simulators, telephone-testing equipment, HATS, pistonphones and calibrators etc.
Warranty
All microphones provided by G.R.A.S. Sound & Vibration are constructed with a stainless steel protection grid and housing as well as special stainless alloy diaphragm for unmatched durability and longevity. All our high precision - type 1 - measurement microphones are delivered with a five year warranty against defective materials and workmanship. All other instrumentation and products are warranted against defective materials and workmanship for a period of two years unless otherwise expressly specified. Excluded from these warranties, however, is damage that is the result of negligent use, incorrect power supplies, or incorrect connections to the equipment. Batteries and other consumables are not covered by the warranty.
Product improvements
G.R.A.S. Sound & Vibration works continuously to improve products and reserves the right to change product specifications without notice in order to take advantage of new technological developments.