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marquee_mask_edges="no" marquee_speed="15000" rotation_effect="bounceIn" display_time="1200" highlight_effect="circle" loop_animation="once" highlight_animation_duration="1500" highlight_width="9" highlight_smudge_effect="no" highlight_top_margin="0" title_link="off" link_target="_self" content_align="left" size="1" text_shadow="no" text_shadow_blur="0" text_stroke="no" text_stroke_size="1" text_overflow="none" gradient_font="no" gradient_start_position="0" gradient_end_position="100" gradient_type="linear" radial_direction="center center" linear_angle="180" style_type="default" animation_direction="left" animation_speed="0.3" animation_delay="0" hide_on_mobile="small-visibility,medium-visibility,large-visibility" sticky_display="normal,sticky" text_color="#ffffff" font_size="41"]Speech Transmission Index Testing[/fusion_title][fusion_text animation_direction="left" animation_speed="0.3" animation_delay="0" disable_idd="no" 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Ecotone Acoustic Limited offers precise acoustic characterization of materials to evaluate their real-world sound performance before integration into architectural or industrial applications. This service includes measurement of acoustic impedance, absorption coefficient, and transmission loss, following internationally recognized ASTM and ISO standards.
By analyzing how materials interact with airborne sound across a range of frequencies, we help manufacturers, designers, and consultants select or validate acoustic products with confidence. These tests are crucial for developing high-performance walls, ceilings, doors, panels, enclosures, and flooring systems.
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Area of Applications
- Classrooms & Lecture Halls: To ensure clear communication between teachers and students in learning
environments. - Auditoriums & Theatres: To enhance speech clarity during presentations, performances, and conferences.
- Places of Worship: To ensure sermons and prayers are clearly audible across large congregational areas.
Transportation Hubs (Airports, Railway & Metro Stations): To test and optimize public address (PA) system
clarity for announcements. - Healthcare Facilities: For nurse call systems and emergency communication clarity in hospitals and clinics.
Shopping Malls & Commercial Buildings: To assess intelligibility of safety announcements and background
audio systems. - Stadiums & Arenas: To validate performance of PA and emergency broadcast systems in large open
spaces. - Museums, Exhibits & Guided Tour Spaces: To ensure speech clarity in areas with automated or live
narration systems.
[/fusion_tab][fusion_tab title=\”Specifications\” icon=\”fa-border-none fas\”]
| Parameter | Specifications |
|---|---|
| Measurement Standard | IEC 60268-16 (STI and STIPA methods) |
| Instrument Used | Brüel & Kjær / NTI / Norsonic STI-certified analyzers |
| Test Signals | Male voice simulation, Pink noise, or Modulated noise |
| Frequency Bands Tested | Octave bands (125 Hz to 8 kHz) |
| STI Scale | 0.00 (Unintelligible) to 1.00 (Excellent) |
| Additional Metrics | RASTI, STIPA, Signal-to-Noise Ratio (SNR), Modulation Loss |
| Test Duration | 30–60 minutes per room, depending on size and complexity |
| Reporting Format | Graphical STI Score Map, Frequency Breakdown, Improvement Recommendations |
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Why Choose PackSound for STI (Speech Transmission Index) Testing?
PackSound’s STI Testing services deliver accurate, standards-compliant assessments of speech intelligibility in any space. Following internationally recognized standards such as IEC 60268-16, we measure STI, STIPA, RASTI, Signal-to-Noise Ratio (SNR), and Modulation Loss to ensure clear and effective communication in rooms of all sizes.
Using advanced STI-certified analyzers from Brüel & Kjær, NTI, and Norsonic, we simulate realistic conditions with male voice, pink noise, or modulated signals across octave bands from 125 Hz to 8 kHz. This allows us to pinpoint areas of poor speech intelligibility and provide actionable recommendations for acoustic improvements.
Whether it’s classrooms, auditoriums, conference rooms, or open-plan offices, our testing gives you a detailed, room-specific analysis. Our graphical STI score maps, frequency breakdowns, and improvement suggestions go beyond numbers, helping architects, acoustic engineers, consultants, and facility managers make data-driven decisions.
PackSound empowers you to enhance speech clarity, reduce communication barriers, and optimize acoustic environments with scientifically validated, reliable results. With our STI Testing, intelligibility becomes measurable, improvable, and presentation-ready for R&D, certification, or client reporting.
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title_font_size=\”24px\” title_line_height=\”1.7\” title_letter_spacing=\”var(–awb-typography1-letter-spacing)\” title_text_transform=\”var(–awb-typography1-text-transform)\” content_padding_top=\”50px\” content_padding_right=\”50px\” content_padding_bottom=\”20px\” content_padding_left=\”50px\” title_padding_top=\”25px\” title_padding_bottom=\”25px\” title_padding_right=\”20px\” title_padding_left=\”20px\” inactivecolor=\”#ffffff\” backgroundcolor=\”#eff4f2\” bordercolor=\”rgba(255,255,255,0)\” active_border_color=\”#129e76\” mobile_mode=\”carousel\” mobile_sticky_tabs=\”yes\”][fusion_tab title=\” Tailored Acoustic Solutions\” icon=\”fa-award fas\”]
![\"Man](\"https://avada.studio/wp-content/uploads/2022/07/472-300x300.jpg\")
We work closely with you to customize EchoStop™ panels that perfectly fit your space’s acoustic needs and design preferences, ensuring optimal sound control and a seamless aesthetic.
[/fusion_tab][fusion_tab title=\”Expert Planning & Design\” icon=\”fa-angle-double-right fas\”]
![\"\"](\"https://avada.studio/wp-content/uploads/2022/07/473-300x300.jpg\")
Our team provides professional acoustic consultation and detailed design planning to integrate panels effectively, maximizing both performance and visual appeal.
[/fusion_tab][fusion_tab title=\”Professional Installation Services\” icon=\”fa-headset fas\”]
![\"People](\"https://avada.studio/wp-content/uploads/2022/07/474-300x300.jpg\")
Certified installers ensure your acoustic panels are fitted precisely and securely, delivering flawless results that enhance sound quality and durability.
[/fusion_tab][fusion_tab title=\”Maintenance & Care\” icon=\”fa-headset fas\”]
EchoStop™ panels require minimal upkeep. With simple cleaning and periodic checks, your acoustic solution will maintain its performance and appearance for years to come.
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content_letter_spacing=\”0.010em\” content_text_transform=\”var(–awb-typography4-text-transform)\” toggle_hover_accent_color=\”#4e85d8\” padding_top=\”10px\” padding_bottom=\”10px\” icon_color=\”#191919\” background_color=\”rgba(79,134,216,0.05)\” border_color=\”rgba(79,134,216,0.2)\” icon_boxed_mode=\”yes\” content_color=\”#424242\” divider_hover_color=\”#4e85d8\” icon_alignment=\”left\” toggle_active_accent_color=\”#ff915e\” type=\”toggles\” boxed_mode=\”yes\” title_color=\”#191919\” hover_color=\”rgba(255,143,92,0.05)\”][fusion_toggle title=\”What is STI Testing and why is it important?\” open=\”no\”]
STI (Speech Transmission Index) Testing measures how intelligible speech is in a space. It helps identify areas where sound clarity may be poor, ensuring effective communication in classrooms, auditoriums, offices, or public venues.
[/fusion_toggle][fusion_toggle title=\”Which standards and methods are used in STI Testing?\” open=\”no\”]
PackSound follows internationally recognized standards, primarily IEC 60268-16, and uses STI, STIPA, and RASTI methods to provide reliable, repeatable results.
[/fusion_toggle][fusion_toggle title=\”What instruments are used for STI measurements?\” open=\”no\”]
We use STI-certified analyzers from Brüel & Kjær, NTI, and Norsonic, capable of simulating male voice, pink noise, and modulated signals for accurate testing across frequency bands from 125 Hz to 8 kHz.
[/fusion_toggle][fusion_toggle title=\”How long does an STI test take?\” open=\”no\”]
Test duration depends on the room size and complexity, typically ranging from 30 to 60 minutes per room. Larger or more complex spaces may require slightly longer sessions.
[/fusion_toggle][fusion_toggle title=\”What deliverables do I receive after STI Testing?\” open=\”no\”]
You receive a comprehensive report with graphical STI score maps, frequency breakdowns, additional metrics like SNR and modulation loss, and actionable recommendations to improve speech intelligibility in your space.
[/fusion_toggle][/fusion_accordion][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]