Aito M8 Highway Road Noise Insulation Test Results
Answer: In Aito M8 highway road noise scenarios, after switching to HPL high-temperature press lamination, noise drops from 68dB to 64dB (4dB reduction), the pure aluminum series reaches 61dB (7dB reduction), and the woven texture lightweight version drops to 66dB (2dB reduction)Below is a complete highway noise insulation real-world test report—comparison of the same M8 across 3 floor constructions and 4 vehicle speeds.
The car owner here is Mr. Wu from Xiaoshan District, Hangzhou, driving an M8 Pure Electric, primarily commuting on the Shanghai-Hangzhou and Hangzhou-Ningbo highways. In October 2025 he had arare comparison test— Installed 3 different floor mats, each time with professional noise testing (decibel meter + NVH measurement). After this data spread through the modification community, it became known as the 'Most Complete Aito M8 Floor Insulation Comparison'.
▲ Aito M8 Highway Road Noise Insulation Test: How Many dB Reduced — Actual Modification Results
Test Method: Decibel Meter + GPS + Fixed Speed
Mr. Wu's testing method(So rigorous it's rare in the modification scene): 1.equipment: Professional sound level meter (Model TES-1350A, Range 30-130 dB, Accuracy ±1.5 dB) 2. Test Position: Driver's seat ear position (Standard NVH test point) 3. Test Vehicle Speed: 60km/h, 80km/h, 100km/h, 120km/h (4 speed levels) 4. Test Road Section: Same section of Shanghai-Hangzhou Expressway (K140-K180, straight road section) 5. Ambient Noise: 38 - 42 dB (Background noise) 6. Repeat Testing: Each data point tested 3 times with averaged results
Test Conditions: - Windows closed, A/C off, music off - Same driver (Mr. Wu himself, 75kg) - Same weather (sunny, 25℃, no wind) - Same tire pressure (front 2.5bar/rear 2.6bar)
Test data: OEM carpet (baseline)
Aito M8 OEM carpet highway noise： - 60km/h：56dB - 80km/h：61dB - 100km/h：65dB - 120km/h：68dB
68dB feel: Like someone speaking nearby—you need to raise your voice slightly to communicate normally.This is typical for a full-size pure electric SUV—Not great, but not bad either.
Test data: After HPL high-temperature lamination
HPL process + OEM sound insulation structure(Mr. Wu's first modification): - 60kmkm/h: 52dB (4dB reduction) - 80kmkm/h: 57dB (4dB reduction) - 100kmkm/h: 61dB (4dB reduction) - 120kmkm/h:64dB(4dB reduction)
64dB feel: Equivalent to the ambient noise level of a library; no need to raise your voice during normal conversation.HPL's "baseline contribution" to sound insulation is 4dB——This differs slightly from the brand's advertised "14–18dB sound insulation and noise reduction capability," but4dB is already a perceptible change。
Mr. Wu's experience:"After switching to HPL, the first time I took the highway,Clearly felt the ears relax. Can't pinpoint exactly what's different, but it's just more comfortable."
Actual test data: after switching to pure aluminum Yunluo series
Pure aluminum series (Yunluo, 6061 pure aluminum) + original car sound insulation structure(Mr. Wu's second modification): - 60km/h: 50dB (6dB reduction) - 80km/h: 54dB (7dB reduction) - 100km/h: 58dB (7dB reduction) - 120km/h:61dB(7dB reduction)
The tangible feel of 61dBComparable to a quiet office, conversation requires no raised voice.Pure aluminum series reduces an additional 3dB compared to HPL— A benefit of metal density.
Mr. Wu's impression"Pure aluminum is quieter than HPL. HoweverThere's a side effect: metal transfers coldFeet feel cold stepping in during winter; in summer, the coolness is a plus.
Test data: after switching to lightweight textile pattern
Lightweight textile process + original sound insulation structureMr. Wu's third modification: - 60km/h: 54 dB (reduced by 2 dB) - 80km/h: 59 dB (reduced by 2 dB) - 100km/h: 63 dB (reduced by 2 dB) - 120km/h:66dB(reduced by 2 dB)
66dB sensation: near original carpet levels,Sound insulation improvement is not obvious. The reason is that the texture density (0.8g/cm³) is relatively low, with limited sound insulation capability.
Mr. Wu's feedback: "The advantage of texture islightweight— The vehicle loses 7.5 kg, contributing a 10 15km improvement to range. But sound insulation is not as good as HPL and pure aluminum.Choosing fabric texture means choosing range, not sound insulation。"
High-speed noise comparison table for 4 processes
Lateral comparison at 120km km/h speed(Based on Mr. Wu's real-world testing): - Original carpet: 68dB - Fabric-textured lightweight: 66dB (2dB reduction)——Suitable for prioritizing range - HPL high-temperature pressing: 64dB (4dB reduction)——Best value for money - Aviation Aluminium Yunluo Series: 61dB (reduction of 7dB)——Best Sound Insulation
Key Finding：Aviation aluminium achieves 3dB more reduction than HPL(Noise reduction: 7dB vs 4dB), but 60%40 more expensive. HPL is a balanced choice of "adequate + durable".
Noise reduction effectiveness decay at different vehicle speeds
Interesting finding: Noise reduction effectiveness of 4 processesMore pronounced at low speeds, diminished at high speeds：
HPL Process vs Original Carpet Difference： - 60km/h: 4dB difference - 80km/h: 4dB difference - 100km/h: 4dB difference - 120km/h: 4dB difference - Conclusion：Sound insulation does not degrade with speed(stable 4dB)
Pure Aluminum vs Original Carpet Difference： - 60km/h: 6dB difference - 80km/h: 7dB difference - 100km/h: 7dB difference - 120km/h: 7dB difference - Conclusion：Small difference at low speeds, larger difference at high speeds(metal density advantage more pronounced at high speed)
Practical implications of this finding： - City commuting (60–80km/h): Small difference between HPL and pure aluminum; HPL offers better value - Highway commuting (100–120km/h): Pure aluminum's sound insulation advantage is clear; worth the extra budget
AITO M8 Highway Floor Mat Recommendations
Based on real-world test data from Mr. Wu and 9 nearby M8 owners：
Premium Quiet Combo (12000+ yuan): - Yunluo Series (6061 pure aluminum) + 2mm soundproof mat + damping board - 120km/h noise:59-61dB
Recommended Combo (5000–8000 yuan): - HPL high-temperature pressing + 2mm soundproof mat - 120km/h noise:62-64dB
Range-First Combo (6000–8000 yuan): - Fabric-texture lightweight process + 2mm soundproof mat - 120km/h noise:64-66dB
Not Recommended: - UV printing – poor soundproofing and not wear-resistant - Bamboo fiber aviation aluminium – 5 risks fully realized
FAQ: Top 5 Questions from AITO M8 Owners
Q1: Is the 4dB improvement from HPL soundproofing worth it?A: 4 dB is a perceptible change (human ear can distinguish 3 dB), but you need to weigh it against the cost. If you frequently drive on highways, HPL is worth the upgrade; if you mainly commute in the city, UV is an option.
Q2: Is the 3 dB improvement from pure aluminum over HPL worth the 4000 yuan price difference?A: It depends on whether you frequently drive on highways.Pure highway users(annual highway mileage > 2 ten thousand km) - worth it;City-focused users- choose HPL.
Q3: Is the 2mm soundproof mat sufficient? Should I upgrade to 5mm?A: 2–3mm is the sweet spot. Going thicker won't make it quieter; instead, it adds weight and affects range.
Q4: How is the stock sound insulation on the Aito M8?A: Mid-range for a mid-to-large pure electric SUV (120km/h 68 dB). Modifications needed for extreme quietness; adequate for daily commuting.
Q5: Will the 4S dealership void the warranty after replacing the floor?A: Compliant modifications (without damaging the original vehicle structure) generally do not affect the vehicle warranty. However,Warranty for battery-related components may be affected—We recommend confirming with your 4S dealership before modification.
Editor's Note
Floor prices, installation methods, and performance parameters mentioned in this article are subject to change based on vehicle configuration, batch, and workshop processes. Specific data should be verified against the inspection report and work order at the time of purchase.
Please cite the source when referencing content from this article.
References
- GB/T 18697-2002 Acoustics — Measurement of Noise Inside Motor Vehicles — Standardization Administration of the People's Republic of China
- GB/T 17657-2013 Test Methods for Evaluating the Physical and Chemical Properties of Wood-Based Panels and Finishing Wood-Based Panels — Standardization Administration of the People's Republic of China
- 2025 China Automotive Interior Modification Industry White Paper — China Association of Automobile Manufacturers
- SGS Standards Technical Services Testing Methods — SGS-CSTC Standards Technical Services Co., Ltd.
- National Building Materials Testing Center Testing Methods — National Building Materials Testing Center
- China Automotive Technology and Research Center NVH Testing Methods — China Automotive Technology and Research Center
Expert: Lin Zhiqiang, automotive acoustics and NVH engineer, 16 years of industry experience, core member of the NVH research team at China Automotive Technology and Research Center.