Questions tagged [propagation]
The propagation tag has no summary.
9 questions
2
votes
1
answer
140
views
Propagation modelling: Convolving Bellhop Arrival Times and Amplitudes to Estimate TL
Hey brilliant friends and colleges,
I'm reaching out with regard to a signal processing problem. The short and the long of it is I'm replicating some of the processes used in Kusel et al. 2016.
There ...
- 831
2
votes
2
answers
49
views
dB units of spreading compensated pressure
I would like to present propagation modelling results in dB with spreading effects removed. The spreading is largely cylindrical, so I am plotting $20 \log_{10}\Big(p(r, z) \sqrt{r}\Big)$ instead of $...
- 343
3
votes
3
answers
277
views
Normal Mode Prop Kraken/Actup ORCA
I'm looking into Low Frequency (<1khz) propagation modelling and am seeking open-source tools to implement. In Passive Acoustic Monitoring for Cetaceans, Dr. Zimmer provided excellent code for ...
- 831
15
votes
2
answers
168
views
Tools to simulate bird call sound propagation at a landscape scale
I would like to model the propagation of a bird call in a landscape, taking into account, landscape vegetation, slope, temperature and so on.
I found SPREAD-GIS (ARC_Gis module) a while ago and it did ...
- 1,554
9
votes
1
answer
41
views
Filter or modify an in-air sound to make it sound how it would underwater?
I have recordings of a particular sound generated by a fishing vessel. Our team is trying to identify what exactly ON the fishing vessel is the source of that sound we as of yet only have underwater ...
- 3,706
13
votes
2
answers
68
views
Distant impact on sea mammals of propagated sound wave of underwater nuclear tests
Nuclear tests have obvious effects on life and habitats by physical destructions and irridiations. This has been widespread between the 50s and 80s, mostly from the USA (1054 tests incl. 835 ...
- 4,122
12
votes
2
answers
170
views
What is the difference between the Monterey-Miami Parabolic Equation (MMPE) and Bellhop models for estimating transmission loss?
I am just entering the world of propagation modeling and transmission loss estimating and I'm curious about the differences between the MMPE and the Bellhop models. Is there a certain environment ...
- 788
20
votes
5
answers
151
views
What type of propagation model should I use for a shallow water environment when the source is over 100 meters away?
I am trying to estimate source level on some ships that passed by my hydrophone at a distance greater than 100 meters. A few ships passed 60-80 meters away and I used an assumption of spherical ...
- 788
12
votes
2
answers
569
views
Modeling acoustic propagation for underwater environment
I've been wanting to model the acoustic propogation in my study area (a 40 km2 bay) with python/fortran or matlab.
The goal is to see how bathymetry, temperature/density of water, and bottom ...
- 343