1. GlottoVibratoGraph (GVG) : It is a device capable of capturing glottal vibrations through accelerometer or piezoelectric sensors which gives information about glottal movements. GVG has been designed as a cost-effective solution to an existing device known as Electroglottograph (EGG) which uses copper electrodes (sometimes gold plated). It is primarily used by clinical speech pathologists for treatment of vocal disorders.

Figure : GVG hardware

2. Language Online (LON): It is an automated language learning system for students with the main thrust on pronunciation, intonation and word stress. It has a web-based interface with machine learning and speech processing tools running in the background. The system uses speech recognition, pattern matching and other signal processing tools to analyze the speech of individuals and provides a proper graphical representation of defects and points to improve.

Figure: LON interface for intonation check