looking for some document where we can detect the emotional stage(anger, sad, happy, neutral etc) from somebody's speech.

Thanks in advance.

Speech emotion recognition is one of the latest challenges in speech processing. Besides human facial expressions speech has proven as one of the most promising modalities for the automatic recognition of human emotions.

We have developed a fast and optimized algorithm for speech emotion recognition based on Neural Networks. We have tested code on Polish Emotional Speech. Database of Polish Emotional Speech comprises 240 recordings from 8 actors (4 females and 4 males). Recordings for every speaker were made during a single session. Each speaker utters five different sentences with six types of emotional load: joy, boredom, fear, anger, sadness and neutral ("no emotion").

i am trying to detect emotion from speech using java. Though i able to save and process the .wav file but unable to find out the frequency of the audio file. can anyone please help to find the frequency of audio signal.