An Oxford University researcher has developed a telephone-based system to help clinicians diagnose and treat patients with diseases that affect their voice.
Dr Baghai-Ravary has developed software which can analyse a brief phone questionnaire, searching for the characteristic signs of a range of conditions which can be caused by anything from Parkinson’s disease and strokes to disorders such as spasmodic dysphonia, which can severely impair the ability of sufferers to communicate, and so create social isolation.
These disorders change the sound of patients’ speech in different ways. Dr Baghai-Ravary’s software looks at the tone, pitch and dynamics of speech, as well as the ways that different sounds are produced, and tests cognitive function using memory and reasoning tests.
The procedure is easy to use, given that the vast majority of people use phones on a daily basis. In trials, volunteers have been asked to perform a series of tasks, such as saying ‘ahhh’ for as long as they could and reciting sample sentences. They have also completed a basic memory test. Recordings of their speech were then compared with statistical models of normal speech to identify any abnormalities.
“We found that different features can indicate different disorders,” says Dr Baghai-Ravary. “and additional tests can be used to evaluate different aspects of reasoning ability.”
The impact of the new procedures – developed via a partnership with Aculab Cloud and OperaVox – will be far-reaching. People have a tendency to put off going to the doctor even if they have early signs of these illnesses. Soon they will be able simply to call a phone number and quickly receive feedback to encourage them to make an appointment for a clinical diagnosis. With obvious cost and time savings for patients and the NHS, it is anticipated that Dr Baghai-Ravary’s work will be deployed in a clinical setting within two years.
Research funded by Higher Education Innovation Fund