nsr

nsr is an acronym used in several fields, carrying different meanings depending on context. The term does not have a single, universal definition, and its interpretation is usually clear from the surrounding subject matter.

Net Sales Revenue: In finance and accounting, Net Sales Revenue (NSR) refers to the revenue earned from sales after returns, allowances, and discounts are subtracted. It is a common metric for assessing a company’s core sales performance and may differ from gross revenues or total invoiced amounts depending on the accounting framework.

Normal Sinus Rhythm: In cardiology, Normal Sinus Rhythm (NSR) denotes a normal heart rhythm that originates in the sinoatrial node. It is characterized by a regular rate, consistent P waves before each QRS complex, and a regular rhythm, indicating proper electrical activity of the heart.

New Source Review: In United States environmental policy, New Source Review (NSR) is a permitting program under the Clean Air Act. It applies to the construction or modification of major emissions sources, requiring pollutant controls and technology improvements to prevent air quality degradation, with oversight by state and federal authorities.

Noise-to-Signal Ratio: In signal processing and related fields, Noise-to-Signal Ratio (NSR) describes the proportion of noise power relative to signal power in a measurement or communication system. It is related to, but distinct from, the more commonly cited Signal-to-Noise Ratio (SNR), and is used to assess data quality and system performance.

Context determines meaning: Because NSR has multiple meanings, its interpretation relies on the field, organization, or accompanying documentation. When encountering the acronym, identifying the relevant domain helps determine the intended sense.