This thesis discusses certain problems in the field of cataloguing sound recordings. Sound recordings are placed in the broader context of non-book materials and are then defined in detail. The history of the cataloging is then presented, followed by a (separate) description of the purpose and development of the International Standard Bibliographic Description or ISBD. The core of the paper deals with the bibliographic description of sound recordings in accordance with the ISBD. The first and the revised edition of the ISBD(NBM) from 1977 and 1987 are briefly outlined and compared, with an emphasis on differences between the two versions. A detailed comparative analysis of the second edition of the ISBD(NBM) and the new, consolidated edition of the ISBD from 2011 is presented. The focus is on area of description 1, specifically on the general material designation element, and on area of description 5, specifically on the special material designation element. Because the consolidated ISBD abandons the general material designation element and introduces a new area of description, 0, which replaces this element, area of description 0 is extensively presented. A comparative analysis of six bibliographic records from COBIB - taken in the ISBD format - is then presented, with suggestions for bibliographic records created in accordance with the consolidated ISBD. The comparative analysis makes it possible to conclude that ISBD standards for describing sound records generally represent a good response to the development of sound recordings, that the most current, consolidated ISBD is suitable for describing all currently known sound recordings and that even in the 21st century, this system provides a framework for describing sound recordings.