Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

qualia @qualia@floofy.tech

1/13/2026, 5:36:17 AM

Quiet public

huh. apparently! blowing on the edge of a bottle to make it whistle (turbulent airstream excitation of a Helmholtz resonator) has a sufficiently repeatable maximum amplitude (for a given shape and size of bottle) that it can be used as a rough volume/SPL calibration technique, for e.g. calibrating smartphone microphones for noise sampling purposes or hearing tests. this study claims a standard deviation of 3.0 dB SPL. interesting!

https://www.tandfonline.com/doi/full/10.1080/14992027.2024.2395416

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