Is Full Soundproofing Effective for the Accord?

[LeahMarie]

Full soundproofing for the Accord is effective and yields noticeable results, but the potential consequences after the soundproofing should also be considered. Noise test results for the Accord: The Honda Accord's noise levels measure 38.5 decibels at idle, 59.3 decibels at 60 km/h, 60.9 decibels at 80 km/h, and 64.1 decibels at 120 km/h. Users seeking better soundproofing can opt for full-vehicle soundproofing, including door soundproofing, chassis soundproofing, trunk soundproofing, and engine compartment soundproofing. Negative consequences after soundproofing: Most modern car interior components are snap-fit, making them prone to loosening after disassembly and reassembly. If installation does not meet factory standards, dust leakage may occur. Poor-quality soundproofing materials can emit toxic fumes in high-temperature areas, affecting human health.

[SanSamuel]

I had soundproofing done on my Accord last year, and overall it does make a noticeable difference, but don’t expect miracles. Wind noise at high speeds is reduced by 30-40%, and tire noise on rough roads isn’t as piercing anymore. However, you can still hear the engine’s humming during acceleration—pairing it with quiet tires would help further. The most effective areas for soundproofing are the chassis and wheel arches, while the roof and door panels show less improvement. Make sure to supervise the installation to prevent the shop from skipping sealant spots, and the thickness of the soundproofing material matters too—too thick can interfere with door closing. If your budget allows, it’s worth doing; daily commutes are much more comfortable for your ears. That said, complete silence isn’t achievable, given the car’s inherent soundproofing structure.

[VanArthur]

When repairing cars, I often encounter car owners asking about sound insulation. For a full sound insulation job on an Accord, the effectiveness really depends on the construction details. Ordinary shops just apply two layers of soundproofing cotton, which doesn't make much difference. A meticulous job involves injecting foam adhesive into the metal panel gaps, applying butyl rubber damping pads on the inner side of door panels, and specifically addressing cavity resonance areas in the trunk. After this treatment, below 60 mph, you'll mostly only hear slight tire noise, and the audio system's performance can even improve. However, wind noise at high speeds remains unavoidable, especially the airflow sound around the rearview mirrors, which can't be completely eliminated. Spending around 7,000 to 8,000 RMB is reasonable, but I must remind you to choose eco-friendly soundproofing materials—substandard materials can emit odors when exposed to summer heat. Also, after modification, the doors become a bit heavier, so women might need to use a bit more force to open and close them.

[KaydenAnn]

Old Wang next door wouldn't stop talking about his Accord's soundproofing all week after getting it done. He said the most noticeable change was that speed bumps in the neighborhood don't make that loud clunking noise anymore, and his kids don't complain about noise when sleeping in the back seat. At low to medium speeds with windows down, outside conversations sound quieter, though you still need to turn up the music to drown out noise above 80 km/h on elevated roads. He suggested focusing on soundproofing just the four doors and trunk to save two thousand bucks. Now, three years later, he mentions the rubber seals have aged a bit, reducing the soundproofing effect by 30-40%. This kind of modification suits those who prioritize driving comfort. For rough-and-tumble guys like me, the factory setup is good enough—better to save the money for gas.