Workplaces are full of sound, most of which is not helpful to workers trying to do their jobs. Scientists are using physics to understand how conversation, music and other ambient noise is experienced by individuals in a variety of work situations. Takeshi Akita, of Tokyo Denki University, will present a talk on 'Effects of sound source and its direction on subjects' impression of soundscape in workplace' at the 178th ASA Meeting.
National Park Service scientists analyzed nearly 1 million 10-second audio recording samples from national parks across the country and discovered a small increase in bird sound detection when an aircraft sound is also detected. During the 178th ASA Meeting, Kurt Fristrup will present the findings and how human responses to noise might be studied.
Atoms absorb and release energy in the form of photons that we perceive as different colors, which can be passed through a prism that reveals the atom's spectrum as colored lines. The lines are specific to the atom and can be used to identify the element it belongs to. During the 178th ASA Meeting, Jill Linz will describe how her interpretation of the interconnectedness of sound and light waves led her to create spectral scales.
Combined with networks of sensors and controllers, Rensselaer Polytechnic Institute's Collaborative Research Augmented Immersive Virtual Environment Laboratory Lab provides its users new modes of interactions between humans and virtual worlds, with experiences ranging from the familiar to the otherwise remote or downright imaginary. During the 178th ASA Meeting, researchers will present work exploring whether the hardware for immersive virtual environments can be made easier to transport while still reproducing audio and video impact.
Killer whale pods each have their own set of calls they use to communicate, sometimes referred to as the pod's 'dialect.' By characterizing a pod's calls, researchers can track its seasonal movements, gaining a better understanding of the whales' lives. Jessica Sportelli at the Scripps Institution of Oceanography studies a pod of relatively unknown killer whales in Pond Inlet, Nunavut, Canada and she will describe their repertoire of calls at the 178th ASA Meeting.
Ultrasound can be used to examine cervix tissue and improve diagnostics, which is essential for predicting preterm births, and ultrasound data is used to compare two techniques for evaluating changes in cervical tissue throughout pregnancy. Researchers are looking at ultrasonic attenuation coefficients that can help scientists characterize cervical changes throughout pregnancy and in preparation for birth before other symptoms, such as contractions or dilation, occur. They will discuss their work at the 178th ASA Meeting.
Physicists from Switzerland, Germany, and France have found that large-amplitude acoustic waves, launched by ultrashort laser pulses, can dynamically manipulate the optical response of semiconductors.
Despite improvements in drug delivery mechanisms, treating brain tumors has remained challenging. Researchers have studied the processes affecting therapeutic drug penetration into brain tumors and will present two strategies for improving the delivery of therapeutic agents during at the 178th ASA Meeting. One approach is to use microbubbles to help overcome vascular barriers within the tumors and improve nanoparticle penetration across the vessel wall. The second method uses ultrasound in combination with temperature-sensitive nanoparticles.
Researchers at Carnegie Mellon University have developed a system that can accurately locate a shooter based on video recordings from as few as three smartphones.
The lack of a clinically viable method to track and direct cancer drugs to tumors is a big problem for targeted therapeutics. But a new ultrasonic method proposed by biomedical engineers from Qifa Zhou's team at the University of Southern California could enable acoustic control and real-time tracking of drug release within the body. The researchers report on their manipulation of ultrasonic waves to pinpoint drug delivery in Applied Physics Letters.