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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 ...
Autoneum (legal name Autoneum Holding AG) is an internationally active Swiss automotive supplier headquartered in Winterthur, Switzerland. Autoneum is one of the leading manufacturers in vehicle acoustic and thermal insulation for vehicles and supplies the majority of global automobile manufacturers. [3] [4]
Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...
Isuzu also used ceramics for the intake and exhaust valves, exhaust manifold, turbocharger housing, camshafts, heat insulation, and rocker arms. [6] [7] [8] Predictions for an adiabatic turbo-compound engine (a theoretical heat-efficient engine) were seen as plausible with the use of technical ceramic material. A 1987 technical paper by Roy ...
The extra layer not only reduces heat loss but has also reduced noise levels inside the car by 3 decibels. [15] It is also used in the roof of the Jaguar F-Type sports car. [16] It features in the upholstery of Saturn sedans, Ford F-150 pickups, Buick Park Avenues, and F-16 fighters. [5]
Thermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials.
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