To create an immersive online experience for National Geographic, photojournalist Martin Edström (@MartinEdstrom, martinedstrom) and his team explored the "infinite cave" Son Doong in Vietnam's Phong Nha-Ke Bang national park, taking 360-degree photos of the almost untouched cave and recording its sounds with Sennheiser stereo and shotgun microphones.
Edström and his team selected an SPM 8000 stereo microphone, MKH 8060 shotgun microphone and MKH 8070 long shotgun microphone for the expedition. All three models are based on Sennheiser's MKH 8000 series radio frequency condenser microphones and feature a very natural sound with extremely low inherent self-noise and high resistance to unfavorable climatic conditions such as moisture, dampness, cold and heat.
Son Doong cave
"We spent five days in the cave photographing and recording," he recalls. "Sound-wise, there was always something to be heard: wind, water dripping, a river running, distant birds, and sometimes also the thundering silence."
Edström wanted to capture the beauty of the cave and preserve it in an archive for National Geographic. "I hope that our documentation of Son Doong will not only help tell the story about this cave, but also preserve a kind of digital copy of the cave, making sure we can visit it digitally, whatever happens to it in the future."
To experience the completed project, visit http://news.nationalgeographic.com/2015/05/150520-infinity-cave-son-doong-vietnam-virtual-tour-photography-conservation/.