The Investigation of the Influence Of Audio Signals Transmission Chain Characteristics on the Spatial Properties of Reproduced Sound
Journal Title: Цифрові технології - Year 2018, Vol 1, Issue 23
Abstract
Contemporary methods of audio signals transmission should be aimed at ensuring the so-called immersive (spatial) sounding, wherein the listener could feel himself "as if present" in the original sound field. When developing such methods, it is necessary to take into account the properties of human auditory perception. From previous studies and practical experience of sound engineers, it is known, that changes of the signal levels in certain frequency domains of their spectrum can result in a change of the sensation of the spatial position of the sound source and other spatial characteristics, such as, for example, the experience of the size of sound source, or the depth of the sound image. Taking into account the importance of such line of research, the influence of changes in the frequency response of audio signals transmission chain in the domain of middle and upper frequencies of the audible bandwidth on the spatial properties of the reproduced sound is considered using different types of sound material: symphonic music, jazz and piano solo. During the investigation, the method of subjective assessment of the reproduced sound quality was applied with the invitation of non-professional experts in the room without a special acoustic adaptation, which comply with the situation of listening in typical living accommodation. Listeners were asked to answer the question about changes in the spatial characteristics of the reproduced sound when changing the frequency response at certain frequencies were made. On the basis of the survey results, it is determined for which types of audio material the change in the signal levels is most noticeable, as well as the way the frequency response of the audio signal transmission chain should be changed from the point of view of enhancement of the spatial properties of sounding. The assessment of the reliability of the result obtained is carried out within this proceeding also. Recommendations on the line of further research work on determining the optimal shape of the frequency response of the audio signal transmission chain are given.
Authors and Affiliations
A. S. Koltsova, V. V. Borisov
Keywords
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