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Long-range radar sensor for application in railway tunnels

✍ Scribed by Lienard, M.; Degauque, P.; Laly, P.

Book ID
114671644
Publisher
IEEE
Year
2004
Tongue
English
Weight
417 KB
Volume
53
Category
Article
ISSN
0018-9545

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Transducers for long-distance pulse-echo rangmg apphcauons should combme bgh efficacy and directwity with a relatively wide bandwdth Smce the air has a very low acoustic impedance, the effinent transnusslon of sound from a sohd transducer 1s one of the major problems A means to improve the impedance