Noise Rating (NR) - Free Online Calculator
The calculator below can used to calculate the NR - Noise Rating:
Sound Pressure Level (dB) - Octave band mid-frequency (Hz)
The NR-diagram with the default values from above:
Related Topics
• Acoustics
Room acoustics and acoustic properties. decibel A, B and C calculations. Noise Rating (NR) curves. Sound transmission through walls. Calculate sound pressure, sound intensity and sound attenuation.
• Noise and Attenuation
Noise is usually defined as unwanted sound - noise, noise generation, silencers and attenuation in HVAC systems.
Related Documents
Noise Criterion (NC) - Free Online Calculator
Calculate Noise Criterion (NC) from octave band pressure levels.
Noise Criterion (NC) Levels: Definitions, Standards & Calculator
Noise Criterion - NC - level is a standard uesd to describe the relative loudness of a space within a range of frequencies.
Noise Criterion vs. Noise Rating and dB(A)
Comparing Noise Criterion (NC, NCB, RNC) to Noise Rating (NR) and dB(A).
NR - the Noise Rating Curve
The Noise Rating (NR) Curve used to determine acceptable indoor environments for hearing preservation, speech communication and annoyance.
Octave Band Frequencies
The octave and the 1/3 octave band frequencies.
PNC - the Preferred Noise Criterion
A noise measurement system for continuous or ambient noise in indoor environments.
Preferred Noise Criterion (PNC) - Calculator
An online Preferred Noise Criterion (PNC) calculator.
Sound - Frequency, Wavelength and Octave
An introduction to the nature of sound with frequencies, wave-lengths and octaves.
Sound Pressure Level
Sound Pressure is the force of sound on a surface perpendicular to the propagation of sound.
Ventilation Systems - Acoustic Calculation Procedure
Acoustic noise calculation procedure HVAC systems.