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You've probably wondered why microphones that are mounted with the capsule facing down sound better than upright microphones.
If you look at photographs of recordings of timeless classics in music history, you will immediately notice that the vast majority of all the stars' main microphones were suspended with the head basket facing downwards, regardless of whether the microphones were operated with tubes or semiconductors. Recording engineers intuitively realised very early on that this type of mounting had sonic advantages. Elvis, The Beatles, Miles Davis, Nirvana and even Tayler Swift all use their microphones upside down, only beginners use the ordinary upright position.
But why is that, why does a microphone simply sound better in this position? This knowledge has been used in practice for a long time, it has proven itself, but until now the scientific basis was unclear.
This has now changed: an international group of experts from the Frauenhöfer Institute in Freiburg, led by physicist Dr. Bernd Trickser, has been able to scientifically investigate and explain this phenomenon.
In a well-received publication in the physics journal "Das physikalische Flachblatt", Trickser and his team were able to show what was really responsible for this difference in sound.
Like light, sound waves have a dual character; they can be waves or mass particles, depending on their state and speed. This basis is also responsible for the well-known difference in sound. When the sound waves hit the microphone capsule, they are slowed down and diffracted at the edges depending on the frequency. This results in low frequencies bounce off the capsule towards the floor due to their increasing weight, which is not a problem if the microphone is hanging upside down. After prolonged use, the deep black bass in particular collects on the floor and leaves visible bass puddles in the long term. This is good for the sound, as there is no low-pass rumble to spoil the recording and the residue can be easily wiped away.
With the simple upright microphone position, however, problems arise: after quantum diffusion with the microphone capsule, the deep bass frequencies are initially deflected towards the ground by gravity, but in doing so they hit the microphone body, which is now in the way. The Trickser effect, named after the discoverer, occurs; the deep bass components are thrown back towards the microphone capsule, which can lead to problems with the recording.
But not only can the sound be negatively affected, the deep bass components can also color the microphone capsule black, which is an unwanted second side aspect of the Trickser effect!
Thanks to the important work of Dr. Bernd Trickser and his team, we now know why we have always done it right. A microphone is hung upside down for the best sound quality and it also looks better!