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Logos is the Voice Therapy Software developed by Inventis, Italy helps the speech therapists in the voice rehabilitation process. Logos includes two USB microphones, one for the patient and one for the therapist, and upto five different modules:

The RT-FrequEn Module calculates in real time the pitch and the energy of the phonation, allowing the following exercises:

• Maintaining the pitch or the energy within a given range
• Imitation of pitch and / or energy
• Phonation duration

The Fono Games Module is for children where control video game with the pitch or the energy of the voice.

The RT-Spectrogram Module calculates in real time and plots the voice spectrogram.

The RT-Power Spectrum Module calculates in real time and plots the power spectrum of the voice.

The RT-Formants Module calculates in real time and plots the Linear Predictive Coding (LPC) and shows the value of the first two formants.