As gas from your stomach comes up your food pipe, it makes the surface of the upper part of your oesophagus rattle and vibrate. It is a bit like windows that rattle during a windy storm.
From bird songs to wind patterns, sound is a key but often underappreciated element of natural places. Learning how to listen to nature can alert us to changes in the environment before we see them.
Record companies released stereo demonstration albums that showcased how sound could move from left to right, creating a sense of movement.
From the collection of Janet Borgerson and Jonathan Schroeder
Sixty years ago, stereo promised to forever change the way people listened to music. But how could record companies convince customers to buy a new record player, speakers and amplifier?
Fly-bys by RAAF Super Hornets and army helicopters are a noisy finale to the Brisbane Festival. While many find this sound awe-inspiring, what of those with lived experience of war?
Kristy E. Primeau, University at Albany, State University of New York and David E. Witt, University at Buffalo, The State University of New York
We tend to think of archaeological sites as dead silent – empty ruins left by past cultures. But this isn't how the people who lived in and used these sites would have experienced them.
A red fox listening for prey under the snow in Yellowstone National Park. Noise can affect foxes and other animals that rely on their hearing when they hunt.
Neal Herbert/NPS
A recent study finds that noise from human activities is intruding into many parks and other protected areas. Creating quiet zones and noise corridors can help reduce impacts from noise pollution.
Unlike vision or touch, sound is much more difficult to control or avoid; music in particular spills across thresholds and intrudes into situations where it is unwelcome.