2D Sound Motion Technology is an advanced articulation training tool that corrects, develops, and trains each American sound through Interactive Visual 2D Sound Simulators. It includes Interactive Visual 2D Sound Simulators for American vowels, consonants, and sound combinations that train the speech organs (tongue, lips, jaw, teeth, airflow, and voice) to produce each American sound correctly. It was created and developed by Prof. Alex, Ph.D. Accent Coach, Doctor of Education, and professional linguist, and it is the core training method of the InPronunci app.
Simulate the sound. Train the sound. Improve the accent.
Why InPronunci is uniquely different
Most apps offer visual learning. InPronunci goes further: its Interactive Visual 2D Sound Simulators train the speech organs (tongue, lips, jaw and airflow) to produce each American sound correctly.
Interactive Visual 2D Sound Simulators are articulation training tools, not visual explanations. They train how the tongue, jaw, lips, teeth, airflow, and voice move during American sound formation. This makes the training process clearer, faster, more effective, and easier to apply in real American speech.
With each simulator, students interact with the 2D mouth movement to start articulating correct American English sounds. During this process, students also listen to the accent coach’s guidance and instructions, which make sure they use their speech organs fully while simulating and training the articulation. This way, students train their speech organs to move into the correct position with full articulation details.
2D Sound Motion Technology and Interactive Visual 2D Sound Simulators were created by Prof. Alex and are used in two places: the InPronunci app and 1-on-1 American accent training at MyAccentWay.
Great American pronunciation starts with sound system training
Language learning includes grammar, vocabulary, and phonology, the sound system of speech. Native speakers absorb phonology subconsciously, but second-language learners are often taught grammar and vocabulary while pronunciation, rhythm, and accent are not trained deeply enough. That is why many advanced English speakers know English well but still struggle to sound clear, fluent, and natural.
To move closer to American speech patterns, students need to train vowels, consonants, stress, rhythm, linking, and sound combinations. Prof. Alex developed 2D Sound Motion Technology with Interactive Visual 2D Sound Simulators for all American sounds and sound combinations, so students can develop the sound system of American English faster and more effectively.
| American sounds | Trained in InPronunci |
|---|---|
| American vowel sounds | 20, each with its own Interactive Visual 2D Sound Simulator |
| American consonant sounds | 24, each with its own Interactive Visual 2D Sound Simulator |
| American sound combinations | 30+ sound interactions, such as [tr] and [dr] |
How 2D Sound Motion Technology trains the American sound system
The main purpose is to simulate, train, and develop American sound articulation faster and more effectively, so students articulate clearer vowels, consonants, and sound combinations, and then apply rhythm and connected speech in real communication. Every sound follows the same three steps:
- Learn the sound articulation: Pronunci Speaks gives Prof. Alex’s instruction for the sound: where the tongue goes, what the lips and jaw do, how the air moves, and whether the voice is on or off.
- Simulate correct sound articulation: students articulate together with the Interactive Visual 2D Sound Simulator, speak the sound out loud, and repeat the movement until the speech organs produce the sound correctly.
- Move the sound into speech: students practice the sound in phonetic exercises, practice sentences (Practice Mode, Your Coach vs. My Pronunci), and paragraphs, then use Evaluation and Feedback Mode with the AI Accent Coach, which gives feedback on each sound mistake.
All American sounds in Interactive Visual 2D Sound Simulators
All American sounds are now available in Interactive Visual 2D Sound Simulators: 20 American vowels, 24 American consonants, and more than 30 sound combinations, each with its own simulator. The American unvoiced [t] lesson below is one of them. It trains how the tongue, jaw, airflow, and release work together during American [t] sound formation.
Why the name is Interactive Visual 2D Sound Simulators:
- Interactive: each simulator was designed to make students repeat the sound and move their speech organs, with accurate voice-over instruction on every mouth movement detail.
- Visual: the simulators were designed in 2D. They are not a picture or a diagram; they are a unique 2D design of animated sound articulation.
- Simulators: they are not something students just see or watch, as with a picture or a diagram. Each simulator has an interactive accent teaching methodology behind it.
Inside the InPronunci App
Train the American [t] sound with its Interactive Visual 2D Sound Simulator
This is the lesson on developing the American Unvoiced Sound [t]: Pronunci Speaks gives the instruction first, then the Interactive Visual 2D Sound Simulator trains the tongue tip and the airflow release.
- Listen to the instructionPronunci Speaks explains where the tongue tip goes and how the air is released for the American [t].
- Train with the simulatorArticulate together with the 2D mouth movement and speak the sound out loud, slowly at first.
- Repeat until it is correctRepeat each movement until the tongue, jaw, and airflow produce the American [t] correctly and automatically.
After the simulator, practice the American [t] at the beginning, middle, and end of words. Say each word slowly and focus on [t] aspiration and a clear release:
- Beginning of words: ten, take, teeth, tool, table, time
- Middle of words: routine, hotel, motel, safety, tattoo, hunting
- End of words: set, sit, white, insight, insist, profit
Why simulation matters: traditional explanation vs. 2D simulator training
In traditional pronunciation training, a teacher may explain where the tongue should go or ask the student to repeat a sound. This can help, but many students remain passive because the articulation movement happens inside the mouth and they may not clearly understand what to change. Static mouth pictures and hand gestures can explain pronunciation, but they do not train the full movement pattern students need for American sounds.
| Traditional sound explanation | Interactive Visual 2D Sound Simulator training | |
|---|---|---|
| Model | A still mouth picture, a hand gesture, or a general explanation. | The full articulation movement of the sound, from start to release. |
| Student’s role | Listens and repeats; the main method is imitation. | Simulates the articulation and trains the speech organs actively. |
| Understanding | Students may not understand what the speech organs are doing, so they guess until it sounds better. | Students train the speech movement behind the sound, not only the sound they hear. |
| Practice | Exercises may feel random or generic, with all sounds in one text. | One sound at a time: simulator, phonetic exercises, sentences, paragraphs, and AI Accent Coach evaluation. |
| Result | Students may gain phonetic knowledge but often cannot keep the American pattern in real communication. | Students turn pronunciation knowledge into stable speech habits they can use in real speech. |
Different from app visuals, pictures, and diagrams
Many pronunciation apps use visuals. InPronunci’s Interactive Visual 2D Sound Simulators are a different kind of tool: they are not pictures, diagrams, or feedback screens. A mouth diagram shows the sound. An InPronunci simulator trains the sound.
| Visual part | ELSA Speak | BoldVoice | InPronunci |
|---|---|---|---|
| What it is | Feedback on your speech. ELSA describes showing “what you missed and how to fix it” and visual dashboards that track progress. | Interactive mouth diagrams that show how sounds are made, along with video lessons from accent coaches. | Interactive Visual 2D Sound Simulators: one training simulator for each American consonant and vowel sound. |
| What the student does | Speaks into the app and receives AI feedback on pronunciation. | Follows the mouth diagrams and the coach video lessons. | Articulates together with the 2D mouth movement, speaks each sound out loud, and follows the accent coach’s instructions. |
| What the visual part does | Shows your results. | Shows how a sound is made. | Trains the speech organs, sound by sound, until each American sound is correct. |
Competitor wording is quoted from the ELSA Speak App Store page and the BoldVoice App Store page. Read the full InPronunci vs. ELSA Speak and InPronunci vs. BoldVoice comparisons.
The research behind the method
2D Sound Motion Technology applies Prof. Alex’s doctoral research on interactive foreign language instruction. Interactive teaching supports language learning because students become active participants in the learning process, not passive listeners. Prof. Alex’s dissertation, “Instructional Conditions and Forms of Interactive Foreign Language Instruction for Engineering University Students” (2017), compared interactive instruction with traditional, teacher-directed instruction in a pedagogical experiment with experimental and control groups.
- The research ran from 2011 to 2016 with 110 first-year university students and a survey of 58 foreign language teachers.
- Statistical analysis with the Mann-Whitney test confirmed that the interactive group significantly outperformed the traditional group on the English progress test. At the final stage, 75% of the interactive group reached a high level of foreign-language competence, compared with 29% of the control group.
- Listening comprehension improved by 2.5%, 2.86%, and 3.74% in three successive groups.
- In the interactive format, 93% of students reported practical language application, 81% reported public-speaking practice, and 57% reported teamwork experience.
A scientific manuscript about Interactive Visual 2D Sound Simulators and pronunciation teaching has been prepared for submission to Language Learning & Technology, Technology in Practice Forum, where the method is presented as an interactive alternative to listen-and-repeat pronunciation instruction.
Published research by Prof. Alex on interactive teaching:
- “Justification of the Main Pedagogical Conditions of Interactive Teaching a Foreign Language in High School,” Procedia – Social and Behavioral Sciences, 206 (2015), 166-172, Elsevier: https://doi.org/10.1016/j.sbspro.2015.10.047
- “Educational Aspects of Interactive Foreign Language Learning in High Schools,” Mediterranean Journal of Social Sciences (2015): https://doi.org/10.5901/mjss.2015.v6n4s3p319
Created by Prof. Alex
Prof. Alex, Ph.D. Accent Coach, Doctor of Education, and professional linguist, created and developed 2D Sound Motion Technology and the Interactive Visual 2D Sound Simulators as an articulation training method, first for MyAccentWay’s interactive 1-on-1 American accent training and Accent Reduction Curriculum, and then for the InPronunci app.
- Doctor of Education (Ph.D. in Education, Theory and Technologies of Professional Education), 2017. In November 2021 the degree was evaluated in the United States by BEIS (Irving, Texas), a Texas Education Agency approved evaluator, as a Doctor of Philosophy in Education at regionally accredited institutions of higher education in the United States.
- Bachelor and Master’s degree in Teaching English to Speakers of Other Languages (TESOL), U.S. equivalence from the same BEIS evaluation.
- 11+ indexed academic publications in linguistics and language education: ORCID, Scopus, Google Scholar.
- Editor-in-Chief of Linguistics and Culture Review.
- ESOL Adult Education Instructor at Austin Community College and lead accent coach of MyAccentWay.
Student results with 2D Sound Motion Technology
Prof. Alex uses the same 2D Sound Motion Technology in 1-on-1 American accent training at MyAccentWay. Students described their experience in their own reviews:
“I like 2D Sound Motion he introduced to develop the American sound! He introduced the Sound [t], and I started to speak this sound after I saw 2D Sound Motion. I think it will help me understand how to pronounce American sounds more effectively.”
Abishek, American Accent Training
“I am impressed with 2D Sound Motion Technology that Prof. Alex developed. […] I got the sound immediately! It is different from other accent coaches’ approach!”
Tian, American Accent Training
Junko, another MyAccentWay student, asked her American coworkers which version sounded more fluent: her old Japanese-accented pronunciation or the same sound produced after training with the 2D simulator. Her coworkers said the second version sounded more familiar and fluent. Hear real before-and-after recordings on the MyAccentWay 2D Sound Motion Technology page.
Start training with Interactive Visual 2D Sound Simulators
Chapter 1, Speech Organs Education, is free after signup on the web, the App Store, and Google Play. The Basic plan is $35 per month. Premium is $200 per month with a 1-on-1 accent training monthly private session.
For live training with Prof. Alex, book a 1 Hour Evaluation Session at MyAccentWay.
Related pages: About InPronunci, AI Accent Coach Guidelines, InPronunci vs. ELSA Speak, InPronunci vs. BoldVoice.
Questions & Answers
FAQ about 2D Sound Motion Technology
01What is 2D Sound Motion Technology?
2D Sound Motion Technology is an advanced articulation training tool that corrects, develops, and trains each American sound through Interactive Visual 2D Sound Simulators. It includes Interactive Visual 2D Sound Simulators, one for each American consonant and vowel sound, that train the speech organs (tongue, lips, jaw, teeth, airflow, and voice) to produce each sound correctly. It was created by Prof. Alex, Ph.D. Accent Coach, Doctor of Education, and professional linguist, and it is the core training method of the InPronunci app.
02What makes InPronunci uniquely different from other pronunciation apps?
Most apps offer visual learning. InPronunci goes further: its Interactive Visual 2D Sound Simulators train the speech organs (tongue, lips, jaw and airflow) to produce each American sound correctly. The simulators are articulation training tools created by Prof. Alex, not pictures, mouth diagrams, or feedback screens.
03What are Interactive Visual 2D Sound Simulators?
Interactive Visual 2D Sound Simulators are the training tools of 2D Sound Motion Technology. They include 20 American vowel simulators, 24 American consonant simulators, and more than 30 American sound combinations, such as [tr] and [dr]. Each simulator has a 2D mouth articulating the American sound with voice guidance, so students articulate together with it, speak the sound out loud, and train their speech organs until the articulation is correct.
04Why are Interactive Visual 2D Sound Simulators effective for accent training?
They place students in an active learning position. Instead of listening and repeating, students simulate the articulation, train the movement of the tongue, jaw, lips, teeth, airflow, and voice, and then move the new sound pattern into phonetic exercises, sentence practice, paragraph practice, and AI Accent Coach evaluation.
05Are InPronunci’s 2D simulators diagrams or pictures?
No. Interactive Visual 2D Sound Simulators are interactive training tools, not diagrams or pictures to look at. Students articulate together with the 2D mouth movement, speak each sound out loud, and train their speech organs (tongue, lips, jaw, teeth, airflow, and voice) to produce each American sound correctly, guided by the accent coach’s instructions.
06What is the difference between ELSA Speak’s visuals and InPronunci’s visuals?
ELSA Speak’s visual features are feedback on your speech. ELSA describes showing you “what you missed and how to fix it,” real-time pronunciation guidance from its AI coach, and visual dashboards that track your progress. InPronunci’s visual part is a training tool. Its Interactive Visual 2D Sound Simulators, one for each American consonant and vowel sound, train the speech organs (tongue, lips, jaw, teeth, airflow, and voice) to produce each sound correctly, guided by Prof. Alex’s accent coach instructions. InPronunci also includes AI Accent Coach evaluation, so students get both training and feedback. In short: ELSA’s visuals show your results; InPronunci’s simulators train the sound itself.
07What is the difference between BoldVoice’s visuals and InPronunci’s visuals?
BoldVoice describes its visual feature as interactive mouth diagrams that show how sounds are made, along with video lessons from accent coaches. InPronunci uses Interactive Visual 2D Sound Simulators, which are training tools: students articulate together with the 2D mouth movement, speak each sound out loud, and train their speech organs, guided by the accent coach’s instructions, until each American sound is correct. In short: a mouth diagram shows the sound; an InPronunci simulator trains the sound.
08How is 2D Sound Motion Technology different from traditional pronunciation training?
Traditional pronunciation training often explains a sound with pictures, hand gestures, or verbal instruction, and students have to guess the rest of the movement. 2D Sound Motion Technology trains the full sound articulation process with Interactive Visual 2D Sound Simulators, so students practice each American sound accurately from the beginning and turn it into a stable speech habit.
09Is 2D Sound Motion Technology research-based?
Yes. The method applies Prof. Alex’s doctoral research on interactive foreign language instruction (2017). In a pedagogical experiment with 110 first-year university students from 2011 to 2016, the interactive group significantly outperformed the traditional group on the English progress test (Mann-Whitney test). A manuscript about the simulators has been prepared for submission to Language Learning & Technology, Technology in Practice Forum.
10Does the method train all American English sounds?
Yes. InPronunci includes simulators for 20 American vowels, 24 American consonants, and more than 30 sound combinations, and the course then moves the sounds into rhythm, linking, intonation, and connected speech.
11Can advanced English speakers improve their accent with 2D Sound Motion Technology?
Yes. Advanced English speakers improve their accent when they train the sound system of American English, not only individual words. Long-term results depend on consistency, practice, and feedback.
12Is 2D Sound Motion Technology also used in 1-on-1 accent training?
Yes. Prof. Alex uses 2D Sound Motion Technology in 1-on-1 American accent training at MyAccentWay, and InPronunci Premium ($200 per month) includes a 1-on-1 accent training monthly private session.
13How can I start training with the simulators?
Sign up on the web, the App Store, or Google Play. Chapter 1, Speech Organs Education, is free after signup. The Basic plan is $35 per month, and Premium is $200 per month with a 1-on-1 accent training monthly private session.
14Who created 2D Sound Motion Technology?
Prof. Alex, Ph.D. Accent Coach, Doctor of Education, and professional linguist, created and developed 2D Sound Motion Technology and the Interactive Visual 2D Sound Simulators. He is the lead accent coach of MyAccentWay and an ESOL instructor at Austin Community College.
15Is InPronunci worth the price?
InPronunci’s price reflects what it includes. Students train with Interactive Visual 2D Sound Simulators built on 2D Sound Motion Technology, developed by Prof. Alex, Ph.D. Accent Coach, Doctor of Education, and professional linguist. Every lesson includes Prof. Alex’s guided instructions, like working with a real coach. The Advanced AI Accent Coach evaluates American sounds, intonation, rhythm, stress, and connected speech against native American English speech, so the score reflects how the speech actually sounds (100 = native speaker). Students can try Chapter 1 for free before choosing the Basic Plan ($35/month) or the Premium Plan ($200/month on the web), which adds 1-on-1 training with Prof. Alex.
16Does InPronunci teach only the articulation of American sounds?
No. InPronunci teaches students how to speak English fluently, comfortably, and confidently. Training may begin with the articulation of each American sound, but it goes far beyond that. Students develop American pronunciation sound by sound, including sound combinations and sound contractions. Then they train these sounds in real rapid speech with phonetic exercises, practice sentences, and paragraphs, so the new pronunciation becomes their natural way of speaking. Step by step, this system helps students speak English with ease in daily conversation, at work, and in public.
