Indian English Speech Emotion Dataset

Data Collection and Gathering The dataset consists of audio recordings from native Indian English speakers across diverse regions of India, capturing a variety of accents and including both genders. Recordings were conducted in controlled, quiet environments to ensure high audio quality, with participants speaking short, natural sentences designed to express four emotions: Happy, Sad, Angry, and Neutral. The original dataset comprises 1,000 samples, evenly distributed across the four emotions .

To enhance model robustness and generalizability, data augmentation techniques—including pitch shifting, time stretching, and controlled noise addition—were applied, expanding the dataset to 3,000 samples. The augmented dataset maintains balance across emotions and is organized into labeled folders (Happy, Sad, Angry, Neutral) to facilitate supervised learning. Notable Findings An LSTM-based model trained solely on acoustic features, without reliance on textual transcription, achieved a classification accuracy of 85% on the original dataset.

With the inclusion of augmented data, the accuracy improved significantly to 96%. These results highlight the effectiveness of acoustic cues in capturing emotional states in Indian English speech and the important role of data augmentation in improving model performance. Data Interpretation and Usage This dataset is a valuable resource for researchers and practitioners in speech emotion recognition and related fields.

Potential applications include: Developing and benchmarking transcription-free speech emotion recognition models. Analyzing acoustic and prosodic patterns unique to Indian English emotional speech. Building sentiment-aware applications such as voice assistants, call center analytics, and mental health monitoring tools.

Investigating the impact of data augmentation on acoustic-based sentiment model performance.