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Memorial Tributes Volume 25 (2023) / Chapter Skim
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DAVID T. BLACKSTOCK
Pages 36-41

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From page 37...
... He was known internationally as an eminent scholar in acoustics, a mentor to both junior and senior ­acousticians, and an extraordinarily caring man. He was born February 13, 1930, to Leo and Harriet Blackstock in Austin and grew up mostly in the Hyde Park neighborhood with his older brother Mathis. After receiving BS and MS degrees in physics at the University of Texas (UT)
From page 38...
... Beginning in the 1970s, David performed research with his graduate students that combined theoretical, experimental, and computational approaches to a wide range of applications in nonlinear acoustics, including sonar, jet noise, parametric arrays, sonic booms, sound-sound interaction, and therapeutic ultrasound. For example, by implementing David's formulation of weak shock theory in a computer code, doctoral student Mike Pestorius became the first to model the propagation of high-intensity noise fields containing shocks.
From page 39...
... Then in the mid-1970s, with master's student Mary Beth Bennett, David proved the existence of the parametric array phenomenon in air, which involves the use of inaudible ultrasound to generate superdirectional audio frequency sound. Audio parametric arrays in air, now called audio spotlights, are encountered in venues ranging from museums to trade shows, wherever transmission of speech with laser-like directionality is desired.
From page 40...
... The seemingly unending corrections of doctoral dissertation chapters in his signature green ink taught students to think logically and write clearly, resulting in dissertations that are models of perfection. His strong drive to build a sense of community among students ranged from playing soccer with them at lunchtime to a program in which he organized lunch dates for students to meet with senior researchers at ASA meetings.


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