Merriam-Webster A Pronouncing Dictionary of American English

je m'en sert pour des lectures comparatives et voire les évolutions/changements avec le temps et je n'en suis pas déçu.

英国刊の発音辞典が3銘柄とも一般米語（GA）をカバーする上に21世紀に入ってからも改訂されているので，ともすれば1950年代に一度改訂されたきりの米音専門の発音辞典が価値を有するようには思えないかもしれません．しかし，この発音辞典は，まだGAの発音が事実上の標準として確立される前の発音辞典だけあって，東海岸・南部の発音についての記述が充実していて，多様な訛りに対応できるという特長があります．発音記号の揺れ方から現代の標準英語にはない2種類の /ɔːr/ が推定できるなど，思わぬ収穫もありました．英語の発音にこだわりたい方には必携の発音辞典なのではないかと思います．

I'm a speech-language pathology student and I got this for my phonetics class. It's a great little thing to have on hand, especially if you have a distinct regional accent like I do (New Orleans accent) and you sometimes pronounce vowels in ways that are non-standard for American English. When I transcribe stuff into IPA, sometimes it's difficult to decide what exact vowel I'm hearing, or if I'm just saying a vowel differently in my head (if that makes sense). This dictionary is helpful for mediating that problem, because it gives me a way to check my transcription against a standard pronunciation, which in turn improves my ability to hear these distinctions. The only thing I would say is that I wish they used a ligature diacritic for their diphthongs. I would love if they used other diacritics, too, and if they made one with diacritics I would buy it immediately.

I use this book to decipher correct pronunciations, not always easy to do with conventional dictionaries.

I came across this dictionary about 30 years ago and it totally changed my life. I learned how to pronounce words just like Americans and that allowed me to work for the U.S. Government. Eventually, I married an American woman and moved to the U.S. and I somehow lost this dictionary. Only now did I find it on Amazon and purchased it just because it means a lot to me. I don't need it anymore but I highly recommend it for anybody whose native language is not English. It doesn't help you with intonation or rhythm but that's not the intent. Great resource. Just remember that you need to pick up one of the regions and stick to it.