0
It is basically a curve on a graph, with octave bands on the x-axis, and Sound Pressure Level on the y-axis. they are used by designers and engineers as well as acoustics engineers to determine the noise floor of a given space. In Europe we use the ISO standard of Noise Rating Curves, they give a reference point of 1KHz. which makes it make a fair bit more sense! If you Google noise rating curves a fair bit of NC stuff comes up... not very useful to me but perhaps to you it might be.
The noise criteria curve (NC curve) is a standard used to assess and rate the indoor noise levels in various spaces like offices, classrooms, and concert halls. It provides a guideline for designing and evaluating the sound levels in these spaces to ensure comfort and productivity for occupants. The NC curve categorizes noise levels into different bands and specifies acceptable thresholds for each band based on the frequency of the noise.
Add your answer:
Earn +20 pts
What is the difference between white noise and gaussian noise?
White noise is a type of signal that has a flat power spectral density across all frequencies, meaning that all frequencies have equal power. Gaussian noise refers to noise with a normal distribution in the time domain. While white noise has uniform power across all frequencies, Gaussian noise has a distribution of values that follows the Gaussian (bell-shaped) curve.
What is the A Weigting on a sound level meter?
A-weighting is a filter used on sound level meters to approximate the sensitivity of the human ear to different frequencies. It reduces the contribution of low and high frequencies that are less audible to humans, focusing on the midrange frequencies that we are most sensitive to. This allows the sound level meter to provide a reading that better reflects how humans perceive and respond to noise.
What do you mean by Gaussian noise?
Gaussian noise is a type of random noise with a probability distribution that follows a Gaussian or normal distribution. It is characterized by a symmetrical bell-shaped curve with values clustered around the mean, making it a common model for natural variations in many systems and processes. The randomness of Gaussian noise can affect signals in various applications such as communication systems, image processing, and measurement devices.
What kind of curve does a projectile make?
A projectile makes a curved path known as a parabolic curve when launched horizontally or at an angle. This curve is a result of the combined effects of gravity and the horizontal velocity of the projectile.
What most likely accounts for the difference between curve A and curve B on the energy diagram?
The difference between curve A and curve B on an energy diagram is most likely due to the activation energy required for the reaction. Curve A likely represents a reaction with a higher activation energy, resulting in a slower reaction rate compared to curve B, which represents a reaction with a lower activation energy and a faster reaction rate.
What is noise criteria?
Noise criteria, commonly known as NC, is a numerical index used to rate indoor noise, noise from air-conditioning equipment, and noise in any other given space.
What is the difference between noise rating NR and noise criteria NC curves?
5 dba NC 25 is approximately 30 DBA and NR 25 is 35 dbA.
What would cause a 1999 Chrysler Sebring LXI front driver side to make a loud growling noise not a popping noise when turning left around a curve but be completely quiet when turning to the right?
Could be a wheel bearing
What are 3 features that would be useful as classification criteria?
High accuracy: The classification criteria should accurately predict the outcome or label of the data points. Robustness: The criteria should be able to generalize well to new, unseen data and not be overly sensitive to noise. Interpretability: It should be easy to interpret and understand how the criteria is making its decisions in order to provide insights and make informed decisions.
What is the difference between white noise and gaussian noise?
White noise is a type of signal that has a flat power spectral density across all frequencies, meaning that all frequencies have equal power. Gaussian noise refers to noise with a normal distribution in the time domain. While white noise has uniform power across all frequencies, Gaussian noise has a distribution of values that follows the Gaussian (bell-shaped) curve.
Name three criteria of a good location for an air-cooled condensing unit?
1.code requirements 2.will not make noise 3. place with low shrubs
When does noise pollution occur?
Noise pollution requires two thing: a source of unpleasant, overly loud or unwanted noise and a person to be bothered by the noise. The criteria for the noise levels and sources are often set out in municipal or other guidelines which specify decibel levels and times of permissible noise. The "bother" caused by the noise is much more difficult to quantify and legal measures usually fall back on terms such as "loss of enjoyment of property"These two criteria are most often met in urban settings (cities, towns, etc.) The sources can be traffic, industrial processes, music or construction.Noise pollution can also occur in places where silence is seen as an aesthetic consideration. This would include areas such as nature preserves, meditative centres, and other places people go to "enjoy peace and quiet". The decibel level of noise pollution in such areas can be much lower.
How the sine curve related to a curve?
Basically, it IS a curve.
What is the c curve and d curve in MCB?
c curve & d curve mcb difference
What is Difference between simple curve and simple closed curve?
simple curve is a curve which doesnot cross itself,it neednot be closed....... but a simple closed curve is a curve which is simple and also closed. every simple closed curve is a simple curve but not vice versa.
What is the difference between a heating curve and a cooling curve?
heating curve is hotter than the cooling curve
Difference between learning curve and experience curve?
difference between leaning curve and experience curve
