11-03-2019, 10:25 PM
(This post was last modified: 11-04-2019, 09:11 AM by MrTester.
Edit Reason: grammar.
)
Greetings PBP friends,
Tonight I decided to dig inside and see what mechanical/ acoustical improvements I could make to the PBP speaker system.
Background: Initially when working on my PBP, I noticed when playing audio, the playback was extremely harsh on the ears and a significant amount of resonance in the palm rest (back side of the speakers) My main goal was to observe and find some mechanical isolation solution to improve audio.
Observations: After opening my PBP, I found the following, A simple speaker, isolated from the metal bottom of the laptop (and speaker grill/opening ) by an adhesive foam surround. The back of the speaker (magnet side) is directly adhered to the plastic palm rests, located in place by molded frame apart of the palm rest.
My initial assessment was that a significant amount of energy was being transferred from the speaker magnet directly into the palm rests, resulting in physical resonance and contributing to the observed acoustical resonance. Considering the space as tight manufacturing tolerances, any mechanical isolation solution would need to be minimal thickness. With the above comment proposing a MFG change would be considered, The cost of such options was in consideration.
I tested Duct tape, Electrical tape, and athletic tape. My intention was to cut just enough tape, to fit behind the speaker, and isolate it from the palm rest. All produced significant reduction in physical energy transfer into the palm rest. The acoustical improvement is reasonable in my opinion, I would like others to test if this is a significant enough of a improvement.
I have included photos of my work, my preferred choice was athletic tape (woven fabric tape, with high adhesive properties).
Tonight I decided to dig inside and see what mechanical/ acoustical improvements I could make to the PBP speaker system.
Background: Initially when working on my PBP, I noticed when playing audio, the playback was extremely harsh on the ears and a significant amount of resonance in the palm rest (back side of the speakers) My main goal was to observe and find some mechanical isolation solution to improve audio.
Observations: After opening my PBP, I found the following, A simple speaker, isolated from the metal bottom of the laptop (and speaker grill/opening ) by an adhesive foam surround. The back of the speaker (magnet side) is directly adhered to the plastic palm rests, located in place by molded frame apart of the palm rest.
My initial assessment was that a significant amount of energy was being transferred from the speaker magnet directly into the palm rests, resulting in physical resonance and contributing to the observed acoustical resonance. Considering the space as tight manufacturing tolerances, any mechanical isolation solution would need to be minimal thickness. With the above comment proposing a MFG change would be considered, The cost of such options was in consideration.
I tested Duct tape, Electrical tape, and athletic tape. My intention was to cut just enough tape, to fit behind the speaker, and isolate it from the palm rest. All produced significant reduction in physical energy transfer into the palm rest. The acoustical improvement is reasonable in my opinion, I would like others to test if this is a significant enough of a improvement.
I have included photos of my work, my preferred choice was athletic tape (woven fabric tape, with high adhesive properties).
-Happy Testing
(Posted from my Pinebook PRO Mate)
Getting Paid to break your product (and make it better) since 2005
(Posted from my Pinebook PRO Mate)
Getting Paid to break your product (and make it better) since 2005