Some aspects on fairly objective results of subjective tests
Klaus Wogram · The Journal of the Acoustical Society of America · 1999
When performing tests with playing subjects on musical instruments it is neccessary to regard that the musicians judge under the influence of prejudices and the appearence of the instrument under test. This obviously affects the results which are no longer generally accepted. To avoid those difficulties the PTB has developed a method which delivers mostly reproducible results for the compared instruments. The aim of this method is to create a psychological situation in which the subject is no longer interested to identify the manufactor and the type or model of the specimen, but will concentrate strictly on the musical parameters like tone color, response, intonation, and others.