Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: Aporia - Silbatone Acoustics speaker
Post Subject: Is the concept of the point source absolutely valid?Posted by Romy the Cat on: 2/9/2009
fiogf49gjkf0d
 drdna wrote:
However, the concept of the point source is absolutely valid. The audio reproduction should follow the transduction from the microphone, which is point source. We have to "play by the rules we make."
Well, let look into it. When we use a term “point source” we use geometrical logic or the logic that space (would it be 2 or 3 dimensional spaces) is equality spreads on all directions. However, does it? We can view propagation of Space only in context of a given coordinate system, if you use classical geometry then you are right: Space equally-dimensional and point source is a single dot in space. However, in audio the coordinate system is not geometry but hearing and human hearing is not equally-dimensional. Humans, juts because the position of ears on heard have much higher sensitivity to horizontal sound source hen to vertical sound source. I do not remember now the equal loudness numbers but roughly is I am not mistaken for horizontally-located head sensitivity in horizontal plane of 1 degree is similar to 5 degree in vertical plane. (Due to the lower bias for receptors) what does it mean? It means that if we are taking about point source for human hearing we are talking not about point but about vertically located 5 points. So, let “play by the rules” we have. There is not such a sing as point source but there an array of point sources…

The Cat

Rerurn to Romy the Cat's Site