The pronunciation of "ya" in American English is typically a short vowel sound, similar to the "e" in "bed" or "yes." This sound is produced by raising the tip of the tongue towards the roof of the mouth, but not touching it, while keeping the vocal cords engaged. The vowel is brief and does not linger, making it a clear and concise sound.

This pronunciation is supported by various linguistic resources and studies. For instance, the American English Pronunciation Guide by the University of Iowa provides a detailed description of the "ya" sound, noting that it is a short vowel and should be produced with minimal vowel length. Additionally, the American English Pronunciation Dictionary by John C. Wells includes "ya" as a short vowel sound, further reinforcing the common pronunciation in American English.

The consistency of this pronunciation across different dialects and regions in the United States suggests that it is a widely accepted and recognized sound in the language. This standardization is crucial for effective communication and understanding among speakers of American English.