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This survey handbook provides guidance for planning and implementing hearing loss surveys, including information on possible data collection tools. The survey handbook aims to enable countries – particularly low- and middle-income countries – to gather data by planning and implementing population-based epidemiological surveys.

The main uses of data collected by such surveys are:

• to provide an accurate picture of hearing loss prevalence in a given area, which could be a country or an area within the country (e.g. district or state);
• to provide an overview of the most common probable causes of deafness and hearing loss in the study area;
• assess global and regional prevalence and trends

Using this survey handbook for data collection will help to ensure comparability of data collected through studies conducted in different countries and by different investigators. This will facilitate the estimation of global prevalence and the examination of hearing loss trends over time.