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  • Application Note - Acoustic Transducer Testing with dScope Series III
    The requirements for acoustic testing are quite unique within the field of audio analysis, and testing requires particular care to ensure good rejection of unwanted reflections (echoes and reverberation) and background noise. This is particularly true in a manufacturing environment where acoustic
  • Dynamic Rotary Torque Measurement using Surface Acoustic Waves (SAW) - A Lonsdale, 2000W (2000)
    The subject of torque measurement has previously been addressed extensively. Most of the. existing transducers either rely on low voltage analogue systems (e.g. conventional resistive. strain gauge) or complicated mechanical assemblies by physically assessing displacement, i.e. optical systems
  • Case Study: Case Depth Analysis of Induction Hardened Steel
    Three short samples of 61.1341 mm diameter induction hardened steel were tested utilizing the ARIS (Acoustic Resonance Inspection System) and three different iterations of a toroidal resonance mode electromagnetic acoustic transducer (RM-EMAT). These samples were marked S, N and D representing
  • Transducers and Arrays for Underwater Sound
    Transducers and Arrays for Underwater Sound. Presenting basic acoustic concepts and models needed in transducer and transducer array development, this book discusses the six major types of electroacoustic transducers and shows why piezoelectric ceramic transducers are suitable for underwater sound.
  • Penetrating Pulse Technology
    The fundamental measurement principle is simple and easy to understand. A special acoustic energy (AE) transducer, mounted in direct contact with the outside vessel wall emits a short 'penetrating pulse” of acoustic energy. The pulse penetrates the vessel wall and eventual lining and travels
  • Case Study: Surface Defect Analysis of Bearing Grade Hot Rolled Steel
    acoustic transducers (RM-EMAT) were fabricated for this test. The transducer width is 1.3" with an axial inspection window of about .75". The first transducer was a 1.970" ID was a N:29 or 29 wavelength transducer that produced a resonant frequency of approximately 547 kHz. This transducer did not provide
  • Guidelines for Specifying Underwater Electroacoustic Transducers
    This paper describes fundamental principles and practical guidelines for specifying or electing underwater transducers. Underwater transducers provide the essential link between the power amplifiers (generators) and the acoustic pressure output, or between the received acoustic pressure
  • Understanding Ultrasonics
    Ultrasonic signals are like audible sound waves, except the frequencies are much higher. Our ultrasonic transducers have piezoelectric crystals which resonate to a desired frequency and convert electric energy into acoustic energy and vice versa. The illustration shows how sound waves, transmitted

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