The Roar and Crackle of Artemis 1

An array of four microphones ready for noise measurements for Artemis 1. Credit: Kent Gee

An array of four microphones ready for noise measurements. Credit: Kent Gee

WASHINGTON, Feb. 14, 2023 – When the Artemis 1 mission was launched by NASA’s Space Launch System, SLS, in November, it became the world’s most powerful rocket, exceeding the thrust of the previous record holder, Saturn 5, by 13%. With liftoff came a loud roar heard miles away. In JASA Express Letters, published on behalf of the Acoustical Society of America by AIP Publishing, researchers from Brigham Young University and Rollins College in Florida reported…click to read more

From the Journal: JASA Express Letters
Article: Space launch system acoustics: Far-field noise measurements of the Artemis-I launch
DOI: 10.1121/10.0016878

Attention-Based Deep Neural Network Increases Detection Capability in Sonar Systems

ABNN’s gradual focus on specific line-spectrum features of a ship. CREDIT: Institute of Acoustics, Chinese Academy of Sciences

WASHINGTON, October 12, 2021 — In underwater acoustics, deep learning is gaining traction in improving sonar systems to detect ships and submarines in distress or in restricted waters. However, noise interference from the complex marine environment becomes a challenge when…Click here to read more.

From the Journal: JASA Express Letters
Link to article: Underwater acoustic target recognition using attention-based deep neural network
DOI: full/10.1121/10.0006299

Compact Speaker Systems Direct Sound Efficiently

A compact speaker system designed to maximize the amount of sound moving toward zero degrees and minimize the sound leakage elsewhere. CREDIT: Wang et al.

WASHINGTON, August 31, 2021 — As electronic devices decrease in size, their component parts, like speakers, need to shrink as well. In JASA Express Letters, published by the Acoustical Society of America through AIP Publishing, researchers from Northwestern Polytechnical University in China and the University of Quebec developed three designs for compact speaker systems that control the…click here to read more.

From the Journal: JASA Express Letters
Link to article: On the design of differential loudspeaker arrays with broadside radiation patterns
DOI: 10.1121/10.0005760