Dysphonia Severity Index (DSI) Calculator: Discover the Calculator with Definition, Formula, Step-by-Step guide, and Interpretation for Dysphonia or Other Voice Disorders Assessment.

DSI Calculator

Dysphonia Severity Index (DSI) Calculator

Streamlined data entry and instant calculation with interpretation guidance

DSI Result

0.00

No dysphonia

DSI Interpretation Guide

Level	DSI Range	Description
0	< −2.0	Severe persisting aphonia: patient has no voice, is unable to phonate
1	−1.9 to +0.3	Constant dysphonia: sporadic periods of phonation, aphonic periods may be present
2	+0.4 to +2.2	Moderate dysphonia: the patient can produce voice, but there are frequent periods of dysphonia
3	+2.3 to +3.3	Slight to moderate dysphonia: less frequent periods of disturbed phonation or slight persisting dysphonia
4	+3.4 to +4.3	Slight dysphonia: sporadic dysphonic moments for short periods
5	> +4.4	No dysphonia

Step-by-Step Guide to use DSI Calculator

Clinic Information

Institution Name: Tag your results to a hospital, university clinic, or private practice.
Clinician Name & Designation: Build traceability for readers to know who’s behind the data.
Contact: Optional, for follow-up or audit trails.

Patient Information

Name, Age, Gender, Mobile, Address: Demographics for record keeping and subgroup analysis.
Date of Assessment: Defaults to today’s date; change if you’re logging past data.
Chief Complaint: Free text—capture patient-reported symptoms.

DSI Measurements

Maximum Phonation Time (MPT in seconds): Ask the patient to sustain /a/ at comfortable pitch and loudness—the longest of three trials.
Highest Frequency (F0-High in Hz): Measure via pitch glissando from modal to highest phonable pitch.
Lowest Intensity (I-Low in dB): Instruct the patient to phonate /a/ at their quietest detectable level.
Jitter (%): Acoustic perturbation measured by your software (e.g., Praat, MDVP).

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