A s a member of the original World Soundscape Project (WSP)-an educational and research group established by R. Murray Schafer at Simon Fraser University (SFU) during the late 1960s and early 1970s-Barry Truax has been working in and...
moreA s a member of the original World Soundscape Project (WSP)-an educational and research group established by R. Murray Schafer at Simon Fraser University (SFU) during the late 1960s and early 1970s-Barry Truax has been working in and around the interdiscipline of acoustic ecology for over thirty years. His two most significant contributions to the subject are the Handbook of Acoustic Ecology (1978) and Acoustic Communication (1984). These two volumes-and R. Murray Schafer's The Tuning of the World (1977) 5-constitute the entire library of published books relating directly to acoustic ecology. It is, therefore, welcome news that the most recent textbook relating to ecoacoustics is no longer seventeen years old, as this year sees the publication of an updated, second edition of Acoustic Communication, reviewed here. For Truax, the major changes occurring between editions are firstly a massive leap in technology and secondly, a large number of relevant publications many of which are mentioned in the updated text. Truax has also taken the opportunity to include a CD ROM with the second edition. This disc contains all the descriptions from the Handbook of Acoustic Ecology in html (web page) format-over 500 terms from the fields of acoustics, psychoacoustics, environmental acoustics, electroacoustics, music , linguistics, audiology, and soundscape studies. The CD represents an incredible resource with many entries containing detailed graphics. The CD also includes over 150 sound clips and relevant examples are listed at the end of each chapter. As with his 1984 original, Truax takes the philosophy-and the soundscape descriptions-introduced in Schafer's inspirational The Tuning of the World framing these within a coherent, communicational model in which to analyse soundscape phenomena. The relatively new academic discipline of Communication focuses upon information; ".. . how it is created, shared, distributed , consumed and used"-to quote SFU's School of Communication web site 6. The first chapter contrasts the energy exchange/ signal processing model used in acoustics with the communicational approach. The latter places the emphasis upon the information in sound, its meaning for the listener and the interlocking behaviour of sound as a system of relationships. The contrast between the "energy transfer" and the communication approaches highlights the major change of mindset required not only of educationalists like myself (whose knowledge of sound has been learned via a signal processing model), but also for environmental acousticians, legislators and even the general public. For all of these groups, sound tends to be treated as an isolated object in the environment and the individual-the listener-becomes a human sound level meter whose sole relationship to sound is a function of its intensity. In reaction to this statement, environmental acousticians will point to the various sound intensity/pressure scales that attempt to factor in location-or type-of sound, human physiology (our sensitivity to the certain parts of the frequency spectrum) and psychology (scales that take into account subjective reactions such as "annoyance"). 7 While these scales have their uses, there is more-much more-to our relationship with sound and the environment through sound, just as there is far more to our relationships with ourselves and with each other than could ever be described in a library full of novels, science and psychology text books. An example of the sophistication of our relationship with sound appears in Chapter 2 (entitled The Listener). Here Truax notes how an accurate recording of a sound event is often less successful in evoking a sound memory than a "skilful simulation that simplifies and idealises it" (p30). I can vouch for this; when working on a play that required the sound of a WW2 air raid siren, a BBC recording of the real thing was rejected by the author (who lived through the event) in favour of a synthesised version that had her trembling as soon as she heard it. Chapter 2 also examines modes of listening-background listening, listening "in search" and "in readiness"-and the soundscape terminology that first saw publication in The Tuning of the World (keynotes, sound signals, etc.). Chapter 3 concentrates on the human voice and on human soundmaking covering language, the acoustic structure of dialogue, the techniques of acoustic persuasion and the concept that the human voice reflects the whole person. In this chapter, as in all chapters, Truax makes extensive reference to the literature that informs his research. In Chapter 4 Truax develops a more theoretical survey of what he describes as the three major systems of acoustic communication speech , music and the soundscape. These, he suggests, form a continuum and he makes a case for the significance of ordering them as listed above before developing a model that relates sound and meaning via structure. "At the most basic level of each system [speech, music and the soundscape]" he notes, "we find that sound is in some way 'organised' and that through the structure of this organisation, meaning can be inferred." (p55). The organisational