I really liked this sketches from one of the first sound projects called Soundcube, made in 1969 by Bernhard Leitner. See more;
"Bernhard Leitner is considered a pioneer of the art form generally referred to as “sound installation.” He introduced sound to the installation space, allowing the installation space to emerge through the sound. Leitner, who actually studied architecture, has been a visionary ever since the very start of his artistic career. His sculptures—which he refers to as “sound-space objects”—and installations are the result of long, complex processes of development. In precise sketches and workbooks, he first approaches the sculptural, architectural qualities of sound in theory.
He undertakes, as it were, foundational scientific research by studying frequencies, volumes, movements and combinations of sounds and their impact on the body, sketching possible spatial figures, such as cubes, corridors, fields, pipes, and exploring the impact of bodily posture on acoustic perception. In 1968 Leitner moved to New York, where he concretely began working on sound-space studies in his studio. He developed multi-channel compositions using sound recordings that were not musically conceived, from which he extracted specific sound material and combined it in work-specific series of sounds. He then notated these series using visual codes that he himself developed consisting of letter combinations on rolls of paper, and transferred them to perforated tape." - Oscar Lopez at archdaily.
I recommend a great article about him at archdaily, see here. And his own website is also full of projects and sound installations which have been archived by date. It's a great source of dynamic and data diagrams, see here.
via | Socks