There are many conferences around the world where people in this field gather and exchange ideas. Among the more useful conferences not held by any of the organizations mentioned above, some are listed here.
a conference mostly for academic people interested in acoustics. They change the conference link every year, so search for "Internoise" in your favorite search engine.
International Operational Modal Analysis Conference
International Conference on Noise & Vibration Engineering
ISMA, is a biennial conference organized by the Catholic University in Leuven, Belgium, and is one of the largest conferences with particular focus on modal analysis and other experimental and analytical vibration analysis tools.