Posttraumatic stress disorder (PTSD), bipolar manic disorder (BMD), obsessive compulsive disorder (OCD), depression, and suicide are some major problems existing in civilian and military life. The change in emotion is responsible for such type of diseases. So, it is essential to develop a robust and reliable emotion detection system which is suitable for real world applications. Apart from healthcare, importance of automatically recognizing emotions from human speech has grown with the increasing role of spoken language interfaces in human-computer interaction applications. Detection of emotion in speech can be applied in a variety of situations to allocate limited human resources to clients with the highest levels of distress or need, such as in automated call centers or in a nursing home. In this paper, we used a novel multi least squares twin support vector machine classifier in order to detect seven different emotions such as anger, happiness, sadness, anxiety, disgust, panic, and neutral emotions. The experimental result indicates better performance of the proposed technique over other existing approaches. The result suggests that the proposed emotion detection system may be used for screening of mental status. 1. Introduction Stressful situation can cause some major psychiatric problems such as depression, suicide, PTSD, BMD, and OCD in civilian as well as in military life. Earlier treatment may become useful for such type of psychiatric problems [1]. So, there is a need to develop technology for recognizing early change in human behavior. Several biomarkers are reported by the medical researchers for psychiatric diseases [1, 2]. But these biomarkers are not effective in military life as they required a big and complicated machine for detecting psychiatric diseases. On the other hand, there is a fast development in voice, speech, and emotion detection technologies in engineering field. These technologies provide human-machine interaction for emotion detection and further treatment of psychiatric problems [3–5]. Several researches measured the level of fatigue and stress from speech [6]. But the level of fatigue and stress does not lead to psychiatric disorder directly. Emotion change of a human can cause mental diseases. Mostly, clinicians recognize the mental state of a patient from his/her face and voice which represents his/her emotion. This fact leads to the possibility that emotion detection system can be used for recognizing the mental disorder or disease in human. Early detection of disease improves the prognosis and is helpful to provide
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