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2. Noise, vibration, and harshness - Wikipedia

   en.wikipedia.org/wiki/Noise,_vibration,_and...

   Noise, vibration, and harshness (NVH), also known as noise and vibration (N&V), is the study and modification of the noise and vibration characteristics of vehicles, particularly cars and trucks. While noise and vibration can be readily measured, harshness is a subjective quality, and is measured either via jury evaluations, or with analytical ...

3. Noise barrier - Wikipedia

   en.wikipedia.org/wiki/Noise_barrier

   The sound tube in Melbourne, Australia, designed to reduce roadway noise without detracting from the area's aesthetics. A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants of sensitive land use areas from noise pollution.

4. Soundproofing - Wikipedia

   en.wikipedia.org/wiki/Soundproofing

   Foams also have cost and performance advantages in installation since foam material can expand and fill cavities after application and also prevent leaks and some gases from entering the vehicle. Vehicle soundproofing can reduce wind, engine, road, and tire noise. Vehicle soundproofing can reduce sound inside a vehicle from five to 20 decibels ...

5. Acoustic quieting - Wikipedia

   en.wikipedia.org/wiki/Acoustic_quieting

   Sound reflections: by limiting the reflection using many methods, e.g. by using acoustic absorption (deadening) materials, trapping the sound, opening a "window" to let sound out, etc. By analyzing the entire sequence of events, from the source to the observer, an acoustic engineer can provide many ways to quieten the machine.

6. Active sound design - Wikipedia

   en.wikipedia.org/wiki/Active_sound_design

   Traditional iterations of sound control in vehicles included tedious mechanical alterations such as balance shafts and sound-deadening material that increased manufacturing time and cost. With the renewal of sound design in the form of ASD, manufacturing costs and complications are reduced.

7. 2025 Infiniti QX80 Drops Jaws with Striking Styling and $100K ...

   www.aol.com/2025-infiniti-qx80-drops-jaws...

   Going on sale this summer, the QX80 has a base price that has risen $8300 to $84,445; its top two trims now cost six figures, with the top Autograph model starting at $112,590. The Infiniti QX80 ...