If you're looking for a different alternative to Audemic Scholar, Audioread is another good choice. It converts text documents into an audio format so you can listen to articles, PDFs, emails and other documents while doing other things. It's got very natural voices, works on multiple devices, and offers a private podcast RSS feed for listening. Audioread costs $9.99 per month, with a 100,000-word conversion limit and support for 77 languages.
Another good alternative is Peech, which converts text to natural-sound audio in more than 50 languages. It has instant audio conversion, AI-powered voice selection and support for a variety of input formats like web pages, PDFs and ebooks. Peech can be useful for people with vision problems, dyslexia or reading difficulties. It's customizable and offers subscription plans, so it can be useful for learning and productivity.
If you're looking for something more narrowly focused for academic use, check out ChatPDF. This AI-powered service helps you understand PDFs by letting you upload documents and ask questions, and it'll respond with answers and summaries. It can handle multiple-file chats and PDFs in any language, which makes it good for students, researchers and anyone who needs quick answers to language-specific questions in documents.