Adjective
whispery (comparative more whispery, superlative most whispery)
Producing or resembling a whisper.
If the arytenoid cartiledges are parted to admit turbulent airflow, the result is whisper phonation if the vocal folds are adducted, and whispery voice phonation (murmur) if the vocal folds vibrate modally. Source: Internet
The IPA uses the term "breathy voice" while VoQS uses the term "whispery voice". Source: Internet