From tjohansson@inria.fr Sat Aug 19 16:55:28 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!inria!tjohansson
From: tjohansson@inria.fr (Tyler Johansson)
Newsgroups: alt.conspiracy
Subject: Data: Paju DMZ 5th tunnel blueprints - acoustic horn relay (Node 03)
Message-ID: <1995Aug19.165528.3014@inria.fr>
Date: Sat, 19 Aug 1995 16:55:28 GMT
Organization: INRIA Rocquencourt
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Why did the South Korean telecommunications ministry build a microwave repeater station directly over an underground tunnel?

The dimensions of the parabolic chamber at the terminus calculate to an exact resonant frequency of 14.20 Hz.
However, unlike the other four invasion tunnels, this tunnel had no southern exit and was lined with acoustic resonance tiles.

They weren't digging a tunnel for troops. They built a massive underground Helmholtz resonator to beam infrasound across the border.

-- 
Tyler Johansson
Tape trading list upon request. SASE required for international mail.

From nsilva@kth.se Mon Aug 21 00:38:28 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!kth!nsilva
From: nsilva@kth.se (Nadia Silva)
Newsgroups: alt.conspiracy
Subject: Re: Data: Paju DMZ 5th tunnel blueprints - acoustic horn relay (Node 03)
Message-ID: <1995Aug21.003828.2961@kth.se>
Date: Mon, 21 Aug 1995 00:38:28 GMT
References: <1995Aug19.165528.3014@inria.fr>
Organization: Royal Institute of Technology, Stockholm
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In article <1995Aug19.165528.3014@inria.fr>, tjohansson@inria.fr (Tyler Johansson) writes:
> Why did the South Korean telecommunications ministry build a microwave repeater station directly over an underground tunnel?
> The dimensions of the parabolic chamber at the terminus calculate to an exact resonant frequency of 14.20 Hz.

A Helmholtz resonator tuned to 14.2 Hz! That's why the Korean pressing (Node 03) decoded line says: 'WHEN THE HATCH IS OPEN, WHO WALKS IN?'

-- 
Nadia Silva | nsilva@kth.se
PGP Key fingerprint: B5AE 51A8 8384 768F
"Keep the channels open."