Öz
The concept of timbre is a phenomenon that is evaluated and tried to be expressed within the scope of music technology and at every stage of music production. The wavelength, intensity and amplitude of the signals obtained from the sound source, properties such as the envelope structure affect the timbre and can be explained physically. Phenomena such as tonal quality and tonal color, which are included in the concept of timbre, have created a chaotic process how to express them in a psychoacoustic evaluation. Used when defining sound color and quality; soft, rich, veiled, light, dull, bright, dark, treble, low, grating, etc. Many expressions are used. In this context, music theorists tried to make this confusion more understandable and developed criteria that included analogical approaches in line with a multidisciplinary study. At the same time, theorists have revealed that the image obtained in audio signal analyzes using spectrograms are approaches that can be analysed and evaluated. This study examines the analogical approaches of Cogan, Blake & Lavengood, which were developed to analyze the concept of timbre, which were obtained and accessible as a result of qualitative research methods and literature review, and a synthesis of historical spectrogram analysis approaches related to timbre was presented.