
Closed
Posted
Paid on delivery
I have a children-focused app where the child records their voice and pronounces a letter. An AI model then converts the speech into text and compares it with the correct expected result. But the AI model cannot recognize some of the letters. I need solution for it Regards
Project ID: 40194432
61 proposals
Remote project
Active 2 mos ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
61 freelancers are bidding on average $528 USD for this job

Hello, I trust you're doing well. I am well experienced in machine learning algorithms, with nearly a decade of hands-on practice. My expertise lies in developing various artificial intelligence algorithms, including the one you require, using Matlab, Python, and similar tools. I hold a doctorate from Tohoku University and have a number of publications in the same subject. My portfolio, which showcases my past work, is available for your review. Your project piqued my interest, and I would be delighted to be part of it. Let's connect to discuss in detail. Warm regards. please check my portfolio link: https://www.freelancer.com/u/sajjadtaghvaeifr
$700 USD in 7 days
7.1
7.1

As-salamu Alaykum! My name is Doan and I have built a solid reputation as a Full-Stack Developer with an absolute devotion to delivering impeccable results, always on-schedule. Your project is perfectly aligned with my core expertise in artificial intelligence (AI), particularly in areas like speech recognition and text-generation. Drawing from my extensive experience with AI systems, I am confident that I can improve the performance of your app's AI model significantly. By employing my deep learning skills, I will fine-tune the Arabic speech-to-text component to ensure accurate recognition of all the letters. I've successfully integrated similar technologies before, showcasing a strong grasp on methods such as OCR and NLP (natural language processing). Choose me for this task, and you'll receive not just an efficient solution but also a collaborator who understands your needs deeply. I am always available for emergency modifications, ensuring that your project remains optimized throughout its lifecycle. Let's enable your app to empower young individuals in mastering letter pronunciations confidently. Shukran!
$500 USD in 5 days
5.5
5.5

Hi, I'm an experienced Python developer with the necessary skills to complete your project. I already worked on NLP project topics including skill sets: • Proficiency in Machine Learning techniques, deep networks (CNN, RNN, LSTM, GRU, Attention Mechanism), • Experience with Chatbot, Question Answering, Sentiment Classification, Named Entity Recognition (NER), Part of Speech (POS) tagging, Lemmatization, Text Similarity, Machine Translation etc. • Fine-tune ChatGPT, GPT (2, 3, 3.5turbo), LLM, BERT, Gemini, Llama, … based on the specific requirements and functionalities. • Experience training or adjusting LLMs (Hugging Face, DeepSpeed). • Strong programming skills, preferably in Python and relevant libraries like Pytorch, TensorFlow, scikit-learn, NumPy, Pandas, NLTK, spaCy, etc. which my skillset allows me to handle large datasets I believe I am the perfect fit for this project. With my skill set, you can be sure that you will receive high-quality results. If you're interested in hearing more about how I could help you, please don't hesitate to reach out! I can provide the requirements with minimum time and cost.
$500 USD in 7 days
5.7
5.7

Hello, As an experienced software engineer with a deep understanding of machine learning, I am confident in providing a customized, comprehensive solution for your Arabic speech-to-text AI model. My proficiency in natural language processing and computer vision will prove invaluable in fine-tuning and training your existing AI model to better recognize the challenging letters. Whether through GPT, Vertex AI, or OpenAI API integrations, I will ensure that the performance of the model doesn't just meet your needs, but exceeds them. In addition to my technical prowess, my business-driven mindset and transparent communication style underline my commitment to practical outcomes. I understand that your app is designed for children, hence special emphasis on accuracy and reliability is essential. With this in mind, I aim to deliver a solution that significantly improves - if not perfects - the entire experience for you and your young users alike. In conclusion, if you chose to work with me, you are choosing a freelancer who can offer not only extreme technical capacity but also an astute business sense and a meticulous approach to problem-solving. My aim is always to provide scalable yet elegant solutions that drive real-world success, and I am eager for the opportunity to do so for your app. Best Regards,
$500 USD in 4 days
5.1
5.1

Hi Suhaib, I’m a Software Services Provider with hands-on experience building Arabic speech-to-text (ASR), phoneme-level pronunciation scoring, and child-focused AI learning apps. I’ve fixed letter-level recognition issues in Arabic by improving audio preprocessing, model fine-tuning, and post-processing rules. I can show demo code for Arabic ASR pipelines + pronunciation matching — then we finalize the deal. How I’ll fix your letter recognition problem: 1️⃣ Analyze misrecognized letters (phonemes/harakat/confusable sounds) 2️⃣ Clean audio pipeline (noise removal, VAD, normalization) 3️⃣ Fine-tune Arabic ASR (Whisper/Wav2Vec2/DeepSpeech) on child voices 4️⃣ Phoneme-level matching (IPA mapping for Arabic letters) 5️⃣ Add confidence scoring + retry UX for kids 6️⃣ Deploy improved model + test set report Techniques & Tools: Python, PyTorch Whisper / Wav2Vec2 (Arabic fine-tuning) Audio preprocessing (VAD, denoise) Phoneme alignment (CTC/forced alignment) NLP post-processing + rules for Arabic letters On-device or API deployment Relevant Projects: ✅ Arabic Kids Pronunciation Coach App ✅ Speech-to-Text Accuracy Boost for EdTech ✅ Phoneme-Level ASR Evaluation System Deliverables: ✔ Improved letter recognition accuracy ✔ Fine-tuned model + inference API ✔ Evaluation report + demo app Share a few failing audio samples — I’ll run a free quick test + demo code to prove the fix, then we proceed.
$1,000 USD in 15 days
4.9
4.9

⭐⭐⭐⭐⭐ Improve AI Speech Recognition for Children's Letter Pronunciation ❇️ Hi My Friend, I hope you're doing well. I reviewed your project requirements and see you are looking for a solution to enhance your children's app. You don't need to look any further; Zohaib is here to help you! My team has already completed 50+ similar projects focused on AI speech recognition. I will analyze the current AI model and implement strategies to improve letter recognition, ensuring a better experience for the children using your app. ➡️ Why Me? I can easily provide a solution for your AI model as I have 5 years of experience in speech recognition and machine learning. My expertise includes data analysis, algorithm improvement, and model training. Additionally, I have a strong grip on other relevant technologies, which will ensure a comprehensive approach to enhancing your app. ➡️ Let's have a quick chat to discuss your project in detail and let me show you examples of my previous work. Looking forward to discussing this with you in chat. ➡️ Skills & Experience: ✅ Speech Recognition ✅ Machine Learning ✅ Data Analysis ✅ Algorithm Optimization ✅ Model Training ✅ Python Programming ✅ Audio Processing ✅ Natural Language Processing ✅ Testing & Evaluation ✅ User Experience Design ✅ Problem Solving ✅ Communication Skills Waiting for your response! Best Regards, Zohaib
$350 USD in 2 days
5.0
5.0

Hello, I’m a Machine Learning Engineer with 8+ years in production NLP and speech systems. I improved a kids learning app where speech models misread phonemes; the issue was accent variation and short utterances, solved using custom phoneme datasets, fine-tuned ASR models, and post-processing correction logic. Result was higher letter recognition accuracy and smoother learning flow. I deliver reliable, practical AI fixes.
$500 USD in 7 days
4.1
4.1

Dear Client, Greetings, i hope you are doing well! I’ve reviewed the projectt requirements and they align well with my expertise. I have hands-on experience in Python, AI/ML, Data Science, and AI model development, particularly in speech-to-text and NLP solutions. For your children focused app, I can address letter recognition issues by improving the speech model for child voices, refining phoneme level comparisons, and applying post-processing to increase accuracy especially for Arabic pronunciation. I’m confident I can deliver a reliable and effective solution within your budget and scope. And also ,I have been coding on Machine Learning and Data Science with python from past 7 years. I have the experience of working with 4 giant tech companies, including freelancing on upwork , fiverr and freelancer. I'd love to discuss furtherr more abt your project. Regards, Rojan U.
$499 USD in 7 days
4.3
4.3

Hi, I am a Computer Science graduate from UC Berkeley with a specialization in Artificial Intelligence. I have more than 10 years of experience in the AI and ML industry. I have experience training and finetuning AI models. I can help you with this project. Message me to discuss this further. Thanks
$500 USD in 7 days
4.0
4.0

Hi, I can improve your app’s speech-to-text accuracy for children’s letter pronunciation by fine-tuning a lightweight ASR model or adding a custom phoneme-based recognition layer. I’ll deliver a working solution integrated into your app with clear documentation.
$250 USD in 7 days
3.6
3.6

Hello client, I just had the chance to go through the project description in detail and it's exciting! Based on my vast experience, this project is straightforward for me, and I have the perfect solution for your problem where the AI model is not recognizing some of the letters. Want the best results in quick time at a cost-effective price? Please message me and experience the difference. Looking forward to contributing to your project success, Fahad.
$250 USD in 2 days
3.8
3.8

Hi there, I’m offering a 25% discount for this project. With expertise in speech recognition and natural language processing for Arabic, I will develop and train a custom Arabic Speech-to-Text (STT) AI model tailored to your specific domain or accent requirements. I specialize in using deep learning frameworks like TensorFlow or PyTorch, working with Arabic speech datasets, and optimizing models for accuracy and performance to convert spoken Arabic into accurate written text. The process includes data collection/preparation or sourcing suitable datasets, designing and training the neural network model (using architectures like Wav2Vec 2.0 or DeepSpeech), evaluating and fine-tuning for your use case, and deploying the model as an API or integrated application component. I will focus on handling the unique challenges of Arabic dialects and phonetics. You’ll receive a trained Arabic STT model with inference code and deployment instructions. My goal is to deliver a robust AI tool that enables voice-driven applications, transcription services, or accessibility features for Arabic-speaking users. Best regards, Sohail
$250 USD in 1 day
3.3
3.3

Hello There!!! ⚜⭐⭐⭐⭐⚜(( Develop an accurate Arabic speech-to-text AI for children’s pronunciation ))⚜⭐⭐⭐⭐⚜ I understand you need an AI model that accurately converts children’s Arabic speech into text and correctly identifies all letters, addressing current recognition gaps. The goal is a robust, child-friendly solution that improves learning outcomes. I have hands-on experience with Arabic NLP, speech recognition model tuning, and AI deployment for interactive applications. I can refine your model using data augmentation, phoneme-level training, and error analysis to improve accuracy. Three key features: 1. Accurate recognition of all Arabic letters 2. Child-focused, responsive feedback mechanism 3. Seamless integration with your app’s recording interface I would be glad to discuss a strategy to enhance your model and ensure reliable performance. Warm Regards, Farhin B.
$256 USD in 10 days
3.8
3.8

Hi, I will deliver a robust Arabic speech-to-text solution optimized for children’s pronunciation. The approach includes phoneme-level modeling, Arabic letter isolation handling, age-specific acoustic tuning, and targeted data augmentation for weak letters. I will refine the recognition pipeline, align outputs against expected graphemes, and implement confidence scoring to reduce false negatives. The result is accurate, child-friendly letter recognition with measurable improvements and deployable model artifacts. Regards, Soas
$750 USD in 5 days
3.0
3.0

Hi Suhaib, ⭐️⭐️⭐️I'll do my best.⭐️⭐️⭐️ I've carefully reviewed your project description and believe my skills and experience perfectly fit your needs. I have 10+ years of experience on Machine Learning (ML), Arabic Translator, Natural Language Processing, AI Text-to-text, AI Model Development and am highly skilled in delivering high-quality results. I am committed to working diligently and exclusively on your project to ensure its success. Let’s build something great together. I’m ready to start immediately and committed to long-term success. Thank you for considering my bid. Lets connect in chat so that We discuss further. Thank You Roman
$300 USD in 7 days
2.1
2.1

Hello, Ladies and gentlemen, we've developed compelling AI-based tools to address complex language challenges, just as your mobile application is grappling with the recognition and correspondence of certain Arabic letters in a speech-to-text model. With our expansive experience in AI Model Development and Machine Learning (ML), we're well-positioned to augment your existing solution effortlessly. Our proficiency spans web, mobile, backend, and AI arenas, ensuring comprehensive service for development projects such as yours. We understand speed, precision, reliability - three hallmarks crucial to any tech project's success. By choosing us, you'll have an opportunity to leverage these favoursome attributes and more. Moreover, our Senior-Level experts and the robust system we employ will ensure a swift, clean architecture-oriented, and user-friendly system- ultimately providing a reliably scalable tool for the children-focused app you've so diligently developed. Let's discuss your project further; together we can make this speech-to-text AI decipher all letters efficiently. Your satisfaction is our driving force. Thanks!
$300 USD in 7 days
1.9
1.9

I am Sumit Joshi from Sacesta Technologies. I can fix letter recognition by switching from “speech to text” to “pronunciation scoring” and adding a child-friendly audio pipeline, so single letters are detected reliably. Why it fails • Most STT models are trained for words and sentences, not isolated phonemes • Kids’ voices vary a lot in pitch, speed, and articulation • Single letters like B, D, E sound similar without context Best solution • Use phoneme or pronunciation assessment instead of plain STT • Score “how close” the child’s sound is to the target letter sound Implementation options • Use a pronunciation scoring API that returns phoneme confidence, then pass/fail with thresholds • Or a tiny on-device classifier per letter using MFCC features (fast, offline, very accurate after training) Audio improvements that help instantly • Record 1.0 to 1.5 seconds with a “beep then speak” cue • Noise gate + normalize volume + trim silence before inference • Collect 10 to 20 samples per letter per age group to tune thresholds Key UX fix • Teach sound, not letter name: “B says buh” not “bee” • Add 2 tries with immediate feedback and example playback Questions • Are you currently using Whisper, Google STT, or something else? • Do you want this to work fully offline or is online ok? Regards, Sumit Joshi
$500 USD in 7 days
1.8
1.8

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I recently developed an Arabic speech-to-text model for a language learning app that accurately recognized children's pronunciation, making the process smooth and reliable. The most crucial part for success in your project is fine-tuning the AI model to accurately capture the unique phonetics of each Arabic letter, especially those that children may pronounce variably. Approach: ⭕ Collect and analyze the misrecognized letters from your current model ⭕ Retrain or fine-tune the speech-to-text model focusing on children's pronunciations ⭕ Implement a comparison layer that matches spoken input to expected letters with tolerance for common variations ⭕ Test extensively with children's recordings to ensure improved accuracy ❓ Could you please share examples of the letters currently causing recognition issues? I am confident I can enhance your app's AI accuracy for children's Arabic letter pronunciation and deliver a reliable solution. Best regards, Nam
$550 USD in 5 days
0.0
0.0

Hello, I noticed that your current Arabic Speech-to-Text AI model is facing challenges in recognizing certain letters when children pronounce them in your app. To address this issue, I would approach solving it by fine-tuning the existing model with more diverse data sets specifically focusing on the problematic letters. In a recent project, I successfully improved speech recognition accuracy by 15% through targeted data augmentation techniques. I believe my experience in optimizing AI models for speech recognition can help enhance the performance of your app. Best regards, Justin
$500 USD in 7 days
0.0
0.0

Could you clarify which letters the AI model is struggling to recognize most often—is it certain consonants, vowels, or both? I can develop a solution to improve your app’s speech-to-text accuracy for children’s pronunciation by either fine-tuning an AI model specifically on children’s voices or implementing a more robust phoneme-based recognition system that handles subtle speech differences. This approach will allow the model to reliably recognize all letters while providing accurate comparisons with the expected results. Do you have a preferred AI framework or are you open to recommendations for retraining or integrating a new recognition model?
$550 USD in 6 days
0.0
0.0

Riyadh, Saudi Arabia
Payment method verified
Member since Apr 4, 2016
$250-750 USD
$30-250 USD
$250-750 USD
$30-250 USD
$250-750 USD
₹12500-37500 INR
₹150000-250000 INR
$15-25 USD / hour
₹600-1500 INR
₹37500-75000 INR
₹12500-37500 INR
₹37500-75000 INR
$750-1500 USD
$250-750 USD
$30-250 AUD
₹12500-37500 INR
min ₹2500 INR / hour
₹1250-2500 INR / hour
₹37500-75000 INR
₹12500-37500 INR
₹12500-37500 INR
₹750-1250 INR / hour
₹750-1250 INR / hour
$1500-3000 USD
$30-250 USD