Ultrasound in Med. & Biol. Vol. 17, No. 4, p. 411, 1991 Printed in the U.S.A.
0301-5629/91 $3.00 + .00 © 1991 Pergamon Press plc
LETTER TO THE EDITOR Sir: Textbooks and articles on ultrasound physics continue to propagate an incorrect description of a beam produced by a circular disc transducer that apparently originated in Kinsler and Frey's textbook (I). I pointed out its faulty geometry and a more accurate representation published by Zemanek (2) in References 3 and 4. Yours truly, F. Kremkau Bowman Gray School of Medicine Wake Forest University Winston-Salem, NC
References 1.
Kinsler LE, Frey AR: Fundamentals of Acoustics. Wiley, New York, 1950.
2.
Zemanek J: Beam behavior within the near-field of a vibrating piston. J Acoust Soc Am 49:181-191, 1971.
3.
Kremkau F: Beam Patterns I. J Ultrasound Med 2:R78-R79, 1983.
4.
Kremkau F: Beam Patterns II. J Ultrasound Med 2:R106-R107, 1983
411
0301-5629/91 $3.00 + .00 © 1991 Pergamon Press plc
LETTER TO THE EDITOR Sir: Textbooks and articles on ultrasound physics continue to propagate an incorrect description of a beam produced by a circular disc transducer that apparently originated in Kinsler and Frey's textbook (I). I pointed out its faulty geometry and a more accurate representation published by Zemanek (2) in References 3 and 4. Yours truly, F. Kremkau Bowman Gray School of Medicine Wake Forest University Winston-Salem, NC
References 1.
Kinsler LE, Frey AR: Fundamentals of Acoustics. Wiley, New York, 1950.
2.
Zemanek J: Beam behavior within the near-field of a vibrating piston. J Acoust Soc Am 49:181-191, 1971.
3.
Kremkau F: Beam Patterns I. J Ultrasound Med 2:R78-R79, 1983.
4.
Kremkau F: Beam Patterns II. J Ultrasound Med 2:R106-R107, 1983
411
