|Statement||prepared for Vehicle Noise Study Subcommittee, Automobile Manufacturers Association Inc. ; [prepared by Bolt Beranek and Newman Inc.].|
|Contributions||Automobile Manufacturers Association. Vehicle Noise Study Subcommittee., Bolt, Beranek, and Newman, Inc.|
|The Physical Object|
|Pagination||x, 79 leaves :|
|Number of Pages||79|
Transportation noise, and motor‐vehicle noise in particular, account for the steady or slowly varying ambient noise level, particularly in urban areas. Being so numerous, motor vehicles can be treated statistically, and this establishes consistent noise emission characteristics. Vehicles are categorized as: passenger cars [including light delivery trucks up to lb gross vehicle weight Cited by: Data from published noise‐annoyance surveys are related to a common measure of noise exposure L results provide means for predicting the annoyance (experienced by percentages of people of normal and of supersensitivity) attributable to noise from aircraft and from street and road traffic. Correlations of to are found between L dn and percentages of people annoyed by aircraft Cited by: The sound quality of vehicle interior noise Figure 2 Principle of head-related transmission The binaural measurement method can be used in all fields where acoustic emissions (acoustic energy radiated by a source) and immissions (acoustic energy incident on aFile Size: KB. Annoyance of vehicle passengers due to squeaking and rattling noises is investigated. The investigation was carried out in the following steps: measurements, physical analysis of the measurement.
Interior noise has become an important vehicle quality task for acoustical engineers in the automotive industry for more than 30 years. However, the goals have changed during this period. At first, acoustical engineers in the automotive industry were confronted with the task to make the interior noise of a vehicle . “Motor Vehicle Noise: Identification and Analysis of Situations Contributing to Annoyance.” Bolt, Beranek and Newman, Inc., Report No. , Google Scholar. Road Noise results from the contact of the rotating wheels (tires) and the road and can generally be separated into airborne and a structure borne contribution. The vehicle interior road noise is, on one hand, influenced by excitation that depends e.g. upon the road surface and the tires, and may even vary with tire pressure. This reference for hearing conservation professionals covers noise-related issues within the workplace and the community. Eighteen contributions from researchers and audiologists are organized into sections on the fundamentals of sound, vibration, and hearing; elements of a hearing conservation program (HCP); noise interference and annoyance; and regulations, standards, and laws.
EVALUATION OF THE EFFECTS OF MOTOR VEHICLE NOISE REGULATIONS ON POPULATION. This paper presents a conceptual method of quantifying the effects of a change in environmental noise on public health and welfare and, as an example of the application of this method, a first approximation to quantifying the impact of motor vehicle noise regulations. Figure 6 shows that the growth of annoyance when making comparisons between vehicles is less steep than it is within a vehicle and has a value of about one unit increase in annoyance per 6 dB increase in noise level, as compared with unit increase in annoyance/3 dB within the A NOISE CRITERION FOR PASSENGER VEHICLES 6 0 X Unbearable 5 O 0. The sources of noise, such as the surface transportation and motor vehicle, are extensively discussed. Negative psychological effects of noise are also covered. The final chapter of the book is about the reduction of noise produced by motor vehicles. The text is a comprehensive source of information about noise intended for the general reader. Hz, so categories of road vehicle noise can be regarded as low frequency. Similar considerations can be made for engines or compressors in industries or co-production plants. Further analysis in this paper is based on the frequency content of LFN from motor vehicles close to the source and at distant receptor locations, the particularly annoying.