STIPA
Speech Intelligibility Tester
About
This app provides a professional-grade speech intelligibility test compliant with international standards. It analyzes test signals to assess audio clarity, essential for public address systems and acoustic evaluations. An optional Pro upgrade offers advanced analysis and reporting features.
What's New in STIPA
4.0
December 22, 2025
-Bug fixes and stability improvements
In-App Purchases
$149.99
STIPA Pro Upgrade
STIPA Pro Upgrade
Developer apps
FAQ
What is STIPA used for?
STIPA is used to test speech intelligibility, which is crucial for ensuring clear announcements in environments like fire evacuation systems, classrooms, and public address systems in houses of worship. It helps verify that spoken information can be understood by listeners.
Is STIPA compliant with standards?
Yes, STIPA is fully compliant with v4 of the standard and meets international standards including IEC 60268-16:2011. It is also required by NFPA fire codes in the United States and other countries.
How does STIPA work?
STIPA works by analyzing a special test signal that can be played directly from your iOS device or from external sources like a CD. The app then processes this signal to provide a speech intelligibility score.
What features are included in STIPA Pro?
The optional STIPA Pro upgrade adds octave band LEQ analysis, full detail reporting, and the ability to save, recall, and export your test results. This provides more in-depth data and management capabilities.
Can I use STIPA with external microphones?
Yes, you can use STIPA with the internal microphone of your iOS device. For more professional use, it is also compatible with external devices like the iTestMic or iAudioInterface2.
What devices does STIPA support?
STIPA is supported on iPhone, iPad, and iPod devices. It requires iOS 4.0 or later and was last updated on December 22, 2025.
What is the price of STIPA?
STIPA is a paid application priced at $49.99. There are also optional in-app purchases for the STIPA Pro features.
Does STIPA have ads?
No, STIPA does not contain advertisements. It is a professional tool designed for accurate measurement and analysis without interruption.
