Sound/Noise
TEMPORAL FLUCTUATION OF ATMOSPHERIC ABSORPTION OF SOUND AND ITS EFFECT ON AIRCRAFT NOISE PROPAGATION DURING A YEAR
... of noise generated from an aircraft flying right overhead at heights from 200m to 3000m were calculated from the absorption coefficients at the range of frequency from 63Hz to 4kHz, assuming that the atmosphere is ...
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Uncertainties in Environmental Noise Assessments – ISO 1996, Effects of Instrument Class and Residual Sound
... environmental noise” is currently under ...environmental noise levels” [1], contains guidelines on assessing and reporting the uncertainties of the determined sound pressure ...the sound ...
8
TEMPORAL VARIATION OF SOUND QUALITY UNDER LONG-TERM EXPOSURE OF CAR INTERIOR NOISE AND SEAT -FLOOR VIBRATION
... the sound exposure until the 20 minutes after the onset of the ...interior noise became more unpleasant in the first one third of the total exposure time and then the evaluations took rather stable ...under ...
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BEHAVIOR OF THE SECONDARY SOURCES AND EXAMINATION OF THE SOUND ENERGY FOR ACTIVE NOISE BARRIER
... active noise barrier (ANB) based on the boundary surface control can obstruct the sound by controlling the sound pressure and the acoustic impedance of the boundary ...the sound power output ...
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Sound, meaning and politics The social construction of aircraft noise annoyance
... other’s sound. What is seen as noise, how much noise can be tolerated and who is allowed to produce the din, is not given with the sound ...Aircraft noise annoyance is in part a social ...
7
ABSTRACT: Reducing sound pressure levels (SPL) from a noise source for improved acoustical quality in
... Reducing sound pressure levels (SPL) from a noise source for improved acoustical quality in terms of speech intelligibility is the principal goal in multi-functional ...in noise is ‘STI in ...
8
ON THE USE OF SOUND METRICS TO EVALUATE NOISE FROM EVs AND HEVs - A LITERATURE REVIEW
... the sound metrics to evaluate sound generated by EVs and HEVs, while displaying also results provided by previous ...of noise in electric and hybrid vehicles at certain manoeuvres, strategies for ...
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A study of different calculation methods for noise barrier top edge designs
... First, sound pressure levels behind Type 1 barrier were compared. The first two results were calculated by the known Fresnel and Kurze & Anderson formulae, while the third graph is the result of the „Sysnoise” ...
5
HOW ACOUSTIC EXPERTS TALK TO “NORMAL PEOPLE”
... Traffic noise, particularly vehicle noise, tyre noise and its relation to noise emission from roads was investigated in numerous ...for noise emission from trains, due to knowledge ...
12
COMPARISON OF SUBJECTIVE RATINGS OF TONAL COMPONENTS WITH MODEL PREDICTIONS WITH SPECIAL CONSIDERATION OF TONE TO NOISE PROCEDURES AS PROPOSED IN E DIN 45681 AND ANSI S1.13
... An original tire sound recorded in the laboratory with a dummy head sitting at the drivers seat served as “background-noise”. Pure tones of 500 Hz with T/N-ratios of 3, 6, 9, 12, 18 dB and narrow-band ...
6
NOISE FROM WIND TURBINES STANDARDS AND NOISE REDUCTION PROCEDURES
... the sound power level and tonality of wind turbines is needed by planners, manufacturers and ...turbine noise specifications tend to be based on measurement results from a single turbine of a particular ...
6
ANALYSIS AND DETECTABILITY IN URBAN ENVIRONMENTS OF AVAS FOR EVs AND HEVs
... vehicles, sound samples from a pass-by test were ...the sound events more ...with noise shaping ...The sound acquisition was made from ±30 meters form the dummy ...
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ENVIRONMENTAL NOISE CONTROL IN THE PULP AND PAPER INDUSTRY
... a sound pressure level of 65 dB(A) at 1m distance from the discharge, a combinaton of absorptive and reactive silencers must be used to cover the whole frequency ...
6
Pantograph noise measurements in Madrid-Sevilla high speed train (AVE)
... the sound power level value has been used as an input for a SEA model which also included vibro-acoustical characterization of the train elements ...estimated noise levels within specifications in this ...
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SOUND-DESIGN DEVELOPMENT WITH SOUND SIMULATION VEHICLE
... measured sound are to be synthesized one need to follow certain measurement procedures for the power train part as well as for the wind and road noise ...wind noise contribution need to be measured ...
6
Color and Sound: Physical and Psychophysical Relations
... the sound produced by an instrument more colorful than the sound of a tuning fork, making the analogy in a direction oppo- site to the one proposed ...and noise with gray or achromatic colors (these ...
9
ACOUSTIC EFFICIENCY OF FALSE CEILINGS: STUDY ON THE INFLUENCE OF DISTANCE FROM THE CEILING SLAB
... To evaluate the changes in performance of these systems, 3 false ceilings were constructed at a distance from the supporting slab of 15 cm, 25 cm and 45 cm. The false ceilings are made of plasterboard with rockwoll on ...
6
1 TOWARDS A QUALITATIVE NOISE MAP BASED ON MEASUREMENT AND PERCEPTION, THE CASE OF ROSSIO SQUARE IN LISBON
... «bad» noise - obtained after consulting a segment of ...the sound attribute of an object of ...a sound or a noise produces sense to the auditor, who attributes it a name by verbalisation, that ...
6
Primeiros Ensaios para a Determinação de Nível de Potência Sonora de Furadeiras no Brasil
... the sound power levels generated by electrical tools and equipments like hair dryer, vacuum cleaner, ...the sound power levels is necessary develop test methods special for each sound ...the ...
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A METHOD FOR THE ASSESSMENT OF SOUNDS AS PERCEIVED SEPARATELY FROM THEIR BACKGROUND
... The results showed that the introduction of human perception during the process of analysis and of treatment of the signal makes it possible to target measurements on one or more noise sources selected separately ...
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