In The Race of Sound Nina Sun Eidsheim traces the ways in which sonic attributes that might seem natural, such as the voice and its qualities, are socially produced. Eidsheim illustrates how listeners measure race through sound and locate racial subjectivities in vocal timbre—the color or tone of a voice. Eidsheim examines singers Marian Anderson, Billie Holiday, and Jimmy Scott as well as the vocal synthesis technology Vocaloid to show how listeners carry a series of assumptions about the nature of the voice and to whom it belongs. Outlining how the voice is linked to ideas of racial essentialism and authenticity, Eidsheim untangles the relationship between race, gender, vocal technique, and timbre while addressing an undertheorized space of racial and ethnic performance. In so doing, she advances our knowledge of the cultural-historical formation of the timbral politics of difference and the ways that comprehending voice remains central to understanding human experience, all the while advocating for a form of listening that would allow us to hear singers in a self-reflexive, denaturalized way.

In Sensing Sound Nina Sun Eidsheim offers a vibrational theory of music that radically re-envisions how we think about sound, music, and listening. Eidsheim shows how sound, music, and listening are dynamic and contextually dependent, rather than being fixed, knowable, and constant. She uses twenty-first-century operas by Juliana Snapper, Meredith Monk, Christopher Cerrone, and Alba Triana as case studies to challenge common assumptions about sound—such as air being the default medium through which it travels—and to demonstrate the importance a performance's location and reception play in its contingency. By theorizing the voice as an object of knowledge and rejecting the notion of an a priori definition of sound, Eidsheim releases the voice from a constraining set of fixed concepts and meanings. In Eidsheim's theory, music consists of aural, tactile, spatial, physical, material, and vibrational sensations. This expanded definition of music as manifested through material and personal relations suggests that we are all connected to each other in and through sound. Sensing Sound will appeal to readers interested in sound studies, new musicology, contemporary opera, and performance studies.