While you're waiting for Flight 8, read about how Starship's launch noise compares to Falcon 9 and SLS at the close, close distance of 1 km!
doi.org/10.1121/10.0...
doi.org/10.1121/10.0...
March 5, 2025 at 5:10 AM
While you're waiting for Flight 8, read about how Starship's launch noise compares to Falcon 9 and SLS at the close, close distance of 1 km!
doi.org/10.1121/10.0...
doi.org/10.1121/10.0...
Reposted by Kent Gee
As Starship is prepped for Flight 8, here's a launch noise analysis of Flights 5 and 6. Atmospheric winds make a big difference in far-field sound levels.
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
Starship Super Heavy acoustics: Comparing launch noise from Flights 5 and 6
This Letter analyzes launch noise from Starship Super Heavy's Flights 5 and 6. While Flight-5 data covered 9.7–35.5 km, the stations during Flight 6 spanned 1.0
doi.org
February 25, 2025 at 2:15 PM
As Starship is prepped for Flight 8, here's a launch noise analysis of Flights 5 and 6. Atmospheric winds make a big difference in far-field sound levels.
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
As Starship is prepped for Flight 8, here's a launch noise analysis of Flights 5 and 6. Atmospheric winds make a big difference in far-field sound levels.
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
Starship Super Heavy acoustics: Comparing launch noise from Flights 5 and 6
This Letter analyzes launch noise from Starship Super Heavy's Flights 5 and 6. While Flight-5 data covered 9.7–35.5 km, the stations during Flight 6 spanned 1.0
doi.org
February 25, 2025 at 2:15 PM
As Starship is prepped for Flight 8, here's a launch noise analysis of Flights 5 and 6. Atmospheric winds make a big difference in far-field sound levels.
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
(Figure quality in the online version is meh; download the free pdf instead!)
doi.org/10.1121/10.0...
@asa-news.bsky.social
And here's a paper that compares launch, flyback boom, and landing noise of the Falcon 9:
doi.org/10.1121/2.00...
@asa-news.bsky.social
@nasaspaceflight.com
doi.org/10.1121/2.00...
@asa-news.bsky.social
@nasaspaceflight.com
February 23, 2025 at 4:59 AM
And here's a paper that compares launch, flyback boom, and landing noise of the Falcon 9:
doi.org/10.1121/2.00...
@asa-news.bsky.social
@nasaspaceflight.com
doi.org/10.1121/2.00...
@asa-news.bsky.social
@nasaspaceflight.com
A student and I studied the sound power produced by (still) the world's most powerful *orbital* rocket, NASA's Space Launch System. We then compared its 202+ dB to the Saturn V. Despite the Saturn V having lesser thrust, it produced greater sound power.
#openaccess
doi.org/10.1121/10.0...
#openaccess
doi.org/10.1121/10.0...
Sound power of NASA's lunar rockets: Space Launch System versus Saturn V
To improve acoustical models of super heavy-lift launch vehicles, this Letter reports Space Launch System's (SLS's) overall sound power level (OAPWL) and compar
doi.org
February 23, 2025 at 4:29 AM
A student and I studied the sound power produced by (still) the world's most powerful *orbital* rocket, NASA's Space Launch System. We then compared its 202+ dB to the Saturn V. Despite the Saturn V having lesser thrust, it produced greater sound power.
#openaccess
doi.org/10.1121/10.0...
#openaccess
doi.org/10.1121/10.0...
An important early publication for me answered: "Do regular sound metrics account for 'crackle' in shock-containing noise?"
The answer led to a search for better metrics for jet and rocket noise.
The #openaccess letter includes multimedia: doi.org/10.1121/1.24...
@asa-news.bsky.social
The answer led to a search for better metrics for jet and rocket noise.
The #openaccess letter includes multimedia: doi.org/10.1121/1.24...
@asa-news.bsky.social
On the potential limitations of conventional sound metrics in quantifying perception of nonlinearly propagated noise
The use of conventional metrics to quantify the perception of nonlinearly propagated noise has been studied. Gaussian noise waveforms have been numerically prop
doi.org
February 22, 2025 at 2:53 PM
An important early publication for me answered: "Do regular sound metrics account for 'crackle' in shock-containing noise?"
The answer led to a search for better metrics for jet and rocket noise.
The #openaccess letter includes multimedia: doi.org/10.1121/1.24...
@asa-news.bsky.social
The answer led to a search for better metrics for jet and rocket noise.
The #openaccess letter includes multimedia: doi.org/10.1121/1.24...
@asa-news.bsky.social
This was the first paper I published in JASA, where we looked global active noise control of small axial fan. We figured out where to place microphones to cause large sound power reductions. doi.org/10.1121/1.16...
Even led to a patent: patents.google.com/patent/US200...
Even led to a patent: patents.google.com/patent/US200...
February 21, 2025 at 3:25 PM
This was the first paper I published in JASA, where we looked global active noise control of small axial fan. We figured out where to place microphones to cause large sound power reductions. doi.org/10.1121/1.16...
Even led to a patent: patents.google.com/patent/US200...
Even led to a patent: patents.google.com/patent/US200...
Reposted by Kent Gee
Why does the Falcon-9 booster make a triple sonic boom?
New research by myself and @kentlgee.bsky.social explains why this happens! Go check it out!
Full Study: doi.org/10.1121/10.0...
Scilight News Feature: doi.org/10.1063/10.0...
New research by myself and @kentlgee.bsky.social explains why this happens! Go check it out!
Full Study: doi.org/10.1121/10.0...
Scilight News Feature: doi.org/10.1063/10.0...
February 20, 2025 at 3:27 PM
Why does the Falcon-9 booster make a triple sonic boom?
New research by myself and @kentlgee.bsky.social explains why this happens! Go check it out!
Full Study: doi.org/10.1121/10.0...
Scilight News Feature: doi.org/10.1063/10.0...
New research by myself and @kentlgee.bsky.social explains why this happens! Go check it out!
Full Study: doi.org/10.1121/10.0...
Scilight News Feature: doi.org/10.1063/10.0...
One of our recent articles has to do with noise measurements of Starship Super Heavy:
doi.org/10.1121/10.0...
We talk about the launch noise and the flyback sonic boom. We have another study coming out soon that compares two flights' launch noise.
doi.org/10.1121/10.0...
We talk about the launch noise and the flyback sonic boom. We have another study coming out soon that compares two flights' launch noise.
Starship super heavy acoustics: Far-field noise measurements during launch and the first-ever booster catch
Far-field (9.7–35.5 km) noise measurements were made during the fifth flight test of SpaceX's Starship Super Heavy, which included the first-ever booster catch.
doi.org
February 13, 2025 at 1:29 AM
One of our recent articles has to do with noise measurements of Starship Super Heavy:
doi.org/10.1121/10.0...
We talk about the launch noise and the flyback sonic boom. We have another study coming out soon that compares two flights' launch noise.
doi.org/10.1121/10.0...
We talk about the launch noise and the flyback sonic boom. We have another study coming out soon that compares two flights' launch noise.
We got a paper published today that answers a not-quite-age-old question:
Why does the Falcon-9 booster make a triple sonic boom during flyback?
Give it a read!
doi.org/10.1121/10.0...
A news summary of the article is here: doi.org/10.1063/10.0...
Why does the Falcon-9 booster make a triple sonic boom during flyback?
Give it a read!
doi.org/10.1121/10.0...
A news summary of the article is here: doi.org/10.1063/10.0...
February 13, 2025 at 12:23 AM
We got a paper published today that answers a not-quite-age-old question:
Why does the Falcon-9 booster make a triple sonic boom during flyback?
Give it a read!
doi.org/10.1121/10.0...
A news summary of the article is here: doi.org/10.1063/10.0...
Why does the Falcon-9 booster make a triple sonic boom during flyback?
Give it a read!
doi.org/10.1121/10.0...
A news summary of the article is here: doi.org/10.1063/10.0...
Hello, world. Thought I'd give this a shot. I'll mostly share research updates & publications here. For starters, here's a list of my publications: physics.byu.edu/faculty/gee/...
If you're interested in but can't download one, let me know.
And here's a rocket launch pic. (DIVH, NROL-70).
If you're interested in but can't download one, let me know.
And here's a rocket launch pic. (DIVH, NROL-70).
February 10, 2025 at 1:06 AM
Hello, world. Thought I'd give this a shot. I'll mostly share research updates & publications here. For starters, here's a list of my publications: physics.byu.edu/faculty/gee/...
If you're interested in but can't download one, let me know.
And here's a rocket launch pic. (DIVH, NROL-70).
If you're interested in but can't download one, let me know.
And here's a rocket launch pic. (DIVH, NROL-70).