- Author
- Posted by kazinator, with replies from numb7rs, ano-ther, mannyv and ramenbytes
- Published
- 15 September 2024
- Kind
- Short forum comment thread, practical opinion and anecdote
- Original
- news.ycombinator.com/item?id=41545860
- Subject
- Systems and hardware
- Themes
- What the senses do
What it is
This is one Hacker News comment and its replies. The story above it is Making a rickroll laser: A parametric speaker. The comments cover speaker design, concert subwoofers, stage monitoring and acoustic foam.
What it says
- Kazinator says directionality is normally an unwanted quality in speakers.
- Kazinator also says beaming suits speakers mounted far away or high above a small area.
- Kazinator says full-range speakers send highs along their axis, so on-axis listeners hear shrill sound.
- A commenter says rear-facing subwoofers with phase delay cut bass behind the stage.
- Another commenter says foam discs with a center hole cut frequencies above about 1khz off-axis.
What evidence it gives
The thread offers only opinion and personal experience. It gives no measurements. One commenter mentions an audio reference book and asks for physics books.
Interests and limits
These are unverified forum comments from pseudonymous users. The commenter on foam discs says the physics is not fully verified. Only this branch was read, not the rest of the story's discussion. The thread is short.