Impulse response of a long underground concrete tunnel. There are 7 impulses of this space in the pack.
There is some very high frequency noise, but that's not a result of digital conversion, it's the noise floor of the system I used to capture the impulses. If it bothers you, use a HPF on the impulse before loading it into a convolution reverb program.
There is no aliasing, but this was a long square concrete tube, so there is definitely some resonant ringing. The slap you hear is the reflection off of the other end of the tunnel. The impulses in this pack were made with 40hz to 24khz log sine sweeps through a speaker, and the recorded sweep was deconvolved with Voxengo to produce this impulse. Each of the 5 clips in the concrete tunnel series make use of acoustic delay times by moving the microphones various distances from the far wall with the speaker remaining stationary at the tunnel's entrance. This slap was recorded with mics close to the far end of the tunnel, so the delay on the slap is fairly short. The shortest slap (I think it's number 1) was with the microphones and the speaker coincident, both aimed toward the far end of the tunnel. The ones labelled Left and Right were created by placing the mic stand and the speaker in the center of the tunnel, and aimed toward a set of steps at the entrance for a more diffused reflection. Those two impulses were captured by simply rotating the ORTF pair 90 degrees left, then 90 degrees right. I hope this helps.
@Ligidium there should be no aliasing, this sample is 48kHz, 24bit depth.Have you actually downloaded the sample or just listened to the 'preview' from the webpage? - The previews are low quality compressed files for fast transmission over the internet. Likely to have artifacts.
Download the sample. Youshould find it to be of good quality.
Any chance of a re-up without the digital aliasing?
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