Atomic beam spectroscopy, including a precision determination of the hyperfine structure of helium-3; semiconductor electronics, including the first experimental realization of a transit–time negative resistance diode; interaction of acoustic waves with electrons in semiconductors, including the discovery of the possibility of acoustic amplification; first correct theory and first experimental observation of the acoustoelectric effect; formulation of the “Weinreich relation” between acoustic attenuation and acoustoelectric effect; far infrared spectroscopy of donor states in germanium, including theory and experimental observation of the splitting of those states in an applied elastic strain field; mechanisms of domain wall motion in ferroelectrics; nonlinear optics, including participation in the first observation of second harmonic generation of light; theoretical models of vortex line motion in liquid helium; theory of bound electron states on the surface of liquid helium; time-of-flight spectroscopy on metastable atom beams and its application to the measurement of electron excitation cross sections and the study of gas kinetics; vibration of piano strings, including the first theoretical discussion of the importance of inter-string coupling and its effect on piano tone; dynamics and radiation field of violins, including the first absolute measurements of violin radiativity; discovery and theory of the “directional tone color” of the violin; theory of vibrating systems; computer synthesis of musical sounds; hammer-string interaction in the piano; theory and experiments on the bowed string, including development of a “digital bow”; measurement of mechanical impedances; theory and experiment on the coupling between wood and air vibration in the violin; dynamics of wind instruments; theory and design of loudspeakers; general theory of structure–fluid interaction; methods of measurements of violins leading to evaluation of quality, development of electric violins.
SOLIDS: ELEMENTARY THEORY FOR ADVANCED STUDENTS, New York, John Wiley and Sons, 1965; FUNDAMENTAL THERMODYNAMICS, Reading, Addison-Wesley, 1968; NOTES FOR GENERAL PHYSICS, Ann Arbor, NEO Press, 1972; MECHANICS OF MUSICAL INSTRUMENTS (Ed.), Wien–New York, Springer, 1995; GEOMETRICAL VECTORS, Chicago–London, University of Chicago Press, 1998; CONFESSIONS OF A JEWISH PRIEST, Cleveland, The Pilgrim Press, 2005.
Service, Awards, and Honors:
Phi Beta Kappa; Sigma Xi; Distinguished Undergraduate Teaching Award (U of M); Collegiate Professor (U of M); Committee of Examiners, Graduate Record Examination; Physics Honors Examiner, Oberlin College; Technical Committee on Musical Acoustics, Acoustical Society of America; Physics Honors Examiner, Kalamazoo College; Consultant, Institut de Recherche et Coordination Acoustique/Musique, Paris; Fellow, Acoustical Society of America; Associate Editor, Journal of the Acoustical Society of America; “Opponent of the Faculty,” Royal Institute of Technology, Stockholm; Visiting Professor, University of Paris; International Medal, Société Française d’Acoustique; American Association of Physics Teachers Klopsteg Award and Lecture; Panel member, Workshop on Science and Religious Faith, Purdue University; Hutchins Gold Medal for Lifetime Achievement in Musical Acoustics; Two sessions honoring Gabriel Weinreich at the 146th Meeting of the Acoustical Society of America; Acoustical Society of America Silver Medal in Musical Acoustics.