telecommunications services and systems utilising voice intonation analysis to provide additional information to users . information on caller &# 39 ; s moods may be obtained from the intonation analysis and stored for later retrieval with information on the calls , including audio data , to which the information relates . an interactive system may be provided to perform intonation analysis on a caller &# 39 ; s reasons for calling and the results of that analysis may be provided to the recipient to assist them in deciding whether to accept the call .