New Across Acoustics Episode – Conservation Bioacoustics: Listening to the Heartbeat of the Earth

Recent advances in technology have allowed scientists to gather larger quantities of acoustic data from locations more remote than ever before. As a result, the study of animal sounds can be used to inform species or habitat conservation and natural resource management practices in new and exciting ways. In this episode, we talk to Aaron Rice of Cornell University about how acoustics can be used to advance conservation efforts, as well as how folks outside of large research universities can take part in efforts to help save the planet with science.

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New Across Acoustics Episode: What is an acoustic metamaterial?

Metamaterials have been a hot topic in the acoustics community since the late 1990s, but there’s no consensus among researchers as to what a metamaterial actually is or when they first came about. Christina Naify (University of Texas – Austin) took a deep dive into the literature about metamaterials and then posed the question to an audience of researchers in a session at the ASA conference in Chicago. In this episode, we talk to her about what came up during this discussion.

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New Across Acoustics Episode: Quiet Down! Lowering the Recommended Occupational Noise Exposure Limit

The National Institute for Occupational Safety and Health’s (NIOSH) recommended exposure limit for occupational noise is often cited as the upper limit for loudness in all situations– but that’s not actually the case. Worse, the limit may not even fit modern ears, which face a barrage of loud sound in and out of the workplace, starting at an early age. In this episode, we talk to Daniel Fink of Quiet Coalition about how NIOSH’s recommended exposure limit for occupational noise impacts even those of us in quiet workplaces, and why the limit needs to be revised downwards.

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New Across Acoustics Episode: Speech research methods and gender-diverse speakers

Traditionally, speech researchers have asked participants to classify speakers on a binary scale for gender. However, as our understanding of gender changes, so must our research methods. In this episode, we talk to Brandon Merritt (University of Texas – El Paso) about their research into updating research protocols to better encompass a diversity of genders and gain a more nuanced understanding of listeners’ perception of speakers’ identity.

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Unlocking the Sounds of Mardi Gras

Mardi Gras, renowned for its vibrant parades in New Orleans, brings to life the spirit of celebration with music and revelry leading up to Ash Wednesday. While the sound of parades may appear commonplace, research has uncovered fascinating nuances in the soundscape. A paper published in the Proceedings of Meetings on Acoustics (POMA) introduces an automated classification algorithm capable of discerning crowd reactions at a Mardi Gras parade from those at a basketball game. Explore the fascinating findings here: https://doi.org/10.1121/2.0001327.

For those who haven’t experienced the magic of a Mardi Gras parade in-person, the question lingers – what is it like? The prospect of virtually attending such events is on the horizon, prompting curiosity about whether the auditory experience can be replicated. In an insightful article published in Acoustics Today, the creation of dynamic virtual soundscapes is explored, offering a glimpse into the potential future of immersive virtual Mardi Gras experiences. You can read more in the article here: https://doi.org/10.1121/AT.2020.16.1.46, or listen to the Across Acoustics podcast episode featuring the author: https://acrossacoustics.buzzsprout.com/1537384/9601986-virtual-sounds

Mardi Gras - Basketball

Cluster distribution of crowd noise for basketball and Mardi Gras data. https://doi.org/10.1121/2.0001327

Mardi Gras - Virtual

Left: watching Mardi Gras on a TV set; right: being literally “inside” Mardi Gras, in a virtual acoustic environment. Original photo of marching band by Prayitno, used under the Creative Commons license with attribution (CC BY 2.0). https://doi.org/10.1121/AT.2020.16.1.46

Excitingly, ASA is set to return to the vibrant city of New Orleans for the 188th Meeting, jointly held with the International Congress on Acoustics from May 19-23, 2025. Having last convened in the city in 2017, the conference yielded a treasure trove of proceedings papers spanning a myriad of acoustics topics. For those captivated by the fusion of sound and science, immerse yourself in the 174th ASA Meeting proceedings here: https://pubs.aip.org/asa/poma/issue/31/1, or check out the Lay Language Papers (LLP) here: https://acoustics.org/lay-language-papers/new-orleans-louisiana/. We hope to see and hear you back in New Orleans in 2025!

Mardi Gras - NOLA Meeting

174th ASA Meeting held in New Orleans in 2017