Signal level at which a device is designed to operate
This article is about the term used in sound and signal processing. For usage in statistics, see Nominal measurement.
Nominal level is the operating level at which an electronic signal processing device is designed to operate. The electronic circuits that make up such equipment are limited in the maximum signal they can handle and the low-level internally generated electronic noise they add to the signal. The difference between the internal noise and the maximum level is the device's dynamic range. The nominal level is the level that these devices were designed to operate at, for best dynamic range and adequate headroom. When a signal is chained with improper gain staging through many devices, clipping may occur or the system may operate with reduced dynamic range.
In audio, a related measurement, signal-to-noise ratio, is usually defined as the difference between the nominal level and the noise floor, leaving the headroom as the difference between nominal and maximum output.[1][2] It is important to realize that the measured level is a time average, meaning that the peaks of audio signals regularly exceed the measured average level. The headroom measurement defines how far the peak levels can stray from the nominal measured level before clipping. The difference between the peaks and the average for a given signal is the crest factor.
^AES Pro Audio Reference definition of signal-to-noise ratio
Nominallevel is the operating level at which an electronic signal processing device is designed to operate. The electronic circuits that make up such...
classification with four levels, or scales, of measurement: nominal, ordinal, interval, and ratio. This framework of distinguishing levels of measurement originated...
A line level describes a line's nominal signal level as a ratio, expressed in decibels, against a standard reference voltage. The nominallevel and the...
on avoiding overuse of nominalization. Texts that contain a high level of nominalized words can be dense, but these nominalized forms can also be useful...
power of the signal, noise, voltage levels, wave forms, may be measured at the TLP. The nominal transmission level at a TLP is a function of system design...
In metaphysics, nominalism is the view that universals and abstract objects do not actually exist other than being merely names or labels. There are at...
Nominal wattage is used to simplify the measurement of the efficiency of a loudspeaker. The impedance of a loudspeaker varies with frequency. This means...
nominal rigidity, also known as price-stickiness or wage-stickiness, is a situation in which a nominal price is resistant to change. Complete nominal...
two types of scales, ordinal and nominal. The first type of categorical scale is dependent on natural ordering, levels that are defined by a sense of quality...
In economics, nominal value refers to value measured in terms of absolute money amounts, whereas real value is considered and measured against the actual...
a list of first-level country subdivisions by nominal gross state product. This list shows top 100 largest subdivisions by GDP nominal and PPP. Those subdivisions...
or attenuation that is applied to the input signal to bring it to a nominallevel for processing. Due to the high gains involved (around +50 dB, for a...
intervals. Hence, referring to a "nominal confidence level" or "nominal confidence coefficient" (e.g., as a synonym for nominal coverage probability) generally...
statistics, dichotomous data may only exist at first two levels of measurement, namely at the nominallevel of measurement (such as "British" vs "American" when...
parameter; this is tantamount to the nominal coverage probability. For example, out of all intervals computed at the 95% level, 95% of them should contain the...
the nominal head whereas the real power lies with the Chief Minister of the State and their council of ministers whereas they acts as the nominal head...
The evangelical Lausanne Movement defines a nominal Christian as "a person who has not responded in repentance and faith to Jesus Christ as his personal...
In finance and economics, the nominal interest rate or nominal rate of interest is the rate of interest stated on a loan or investment, without any adjustments...
association of the cross tabulations when the variables are measured at the nominallevel. Values range from 0.0 (no association) to 1.0 (the maximum possible...
characterized by parameters such as their bandwidth, nominallevel, power level in decibels (dB), and voltage level. The relationship between power and voltage...
services produced in the respective administrative unit) in nominal terms. GSP is the unit-level counterpart of the national gross domestic product (GDP)...
exceed a designated nominallevel. Headroom can be thought of as a safety zone allowing transient audio peaks to exceed the nominallevel without damaging...
limited by circuit breakers or fuses, and the impulse voltages by the nominallevel of voltage. Measuring circuits are subjected to working voltages and...
GDP per capita and can approximate a concept of a standard of living. Nominal GDP does not reflect differences in the cost of living and the inflation...
a given nominal significance level, the true probability of incorrectly rejecting the null hypothesis is never greater than the nominallevel. Exact test...