Audio Speech Intelligibility Score

Overview

The Audio Speech Intelligibility Score tool estimates the clarity of spoken audio by analyzing key acoustic factors including signal level, noise separation, reverberant tails, high-frequency presence, clipping, and speech-band energy. It provides an explainable heuristic quality score to help you quickly evaluate voice recordings, compare audio versions, and flag potential intelligibility risks before publication.

Use cases

Evaluating podcast voice tracks to ensure they meet minimum clarity standards before editing.
Screening online course lectures for excessive room reverb or microphone clipping.
Automating quality control checks for voiceover submissions in localization projects.

Examples

1. Evaluating Podcast Recording Quality

Podcast Producer

Background

A producer receives remote interview recordings from guests using different microphones and environments.

Problem

Some recordings sound muffled or have high background noise, making them hard to understand.

How to use

Upload the guest's raw audio file to the tool to analyze the speech clarity metrics.

Outcome

The tool returns a JSON report showing low noise separation and poor high-frequency presence, confirming the track needs noise reduction.

2. Screening Audiobook Narrations for Clipping

Audiobook Quality Control Editor

Background

An editor needs to verify that newly submitted audiobook chapters do not contain digital clipping or excessive room echo.

Problem

Manually listening to hours of audio to spot occasional clipping or reverb tails is time-consuming.

How to use

Upload each chapter's audio file to check the clipping and reverberant tail component scores.

Outcome

The tool flags chapter 3 with a high clipping count and chapter 5 with long reverberant tails, allowing the editor to target those specific files for re-recording.

FAQ

Is this tool equivalent to an STI or STIPA measurement?

No, this tool calculates an explainable heuristic quality score based on acoustic properties, not a formal physical STI/STIPA measurement.

Does a high score guarantee 100% transcription accuracy?

No, while higher intelligibility correlates with better transcription, the score measures acoustic clarity rather than linguistic accuracy.

What audio formats are supported?

The tool accepts standard audio file formats, typically up to 100MB in size.

How does the tool estimate noise separation?

It analyzes active speech windows and compares their energy levels against quieter, non-speech windows to estimate the signal-to-noise ratio.

Can I use this tool to automatically fix bad audio?

No, this is an analysis tool that flags quality issues and scores intelligibility; it does not modify or process the audio file itself.

What this tool helps you do

Run this tool

Inputs

Result

Examples that match this tool

Continue with connected tools and hubs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Evaluating Podcast Recording Quality

2. Screening Audiobook Narrations for Clipping

FAQ

Speech Learning & Safety Audio Samples

Copyright-Free FLAC Audio Samples

Copyright-Free MP3 Audio Samples

Copyright-Free WAV Audio Samples

Audio Voiceover Take Selector

Audio Breath Control Editor

Audio Click Removal

Audio Declicker

Audio Encoding and Format Conversion Tools

Audio Editing and Cleanup Tools

Audio Preview, Tone, and Effect Generator Tools

Audio Measurement and Inspection Tools