3. The system of claim 1 , wherein the call information further includes a voiceprint of the telephone conversation, and wherein the one or more processors is configured to index the call information based on at least one stress feature identified in the voiceprint.
3. The system of claim 1 , wherein the call information further includes a voiceprint of the telephone conversation, and wherein the one or more processors is configured to index the call information based on at least one stress feature identified in the voiceprint. 5. The system of claim 3 , wherein the stored instructions configure the one or more processors to perform further operations comprising: weighting the one or more identified keywords based on the at least one stress feature identified in the voiceprint; and indexing the call information based on the weighted one or more identified keywords.