Pronunciation: [pˈʌlzd] (IPA) 
The word "pulsed" is spelled with a /d/ at the end because it is the past tense of the verb "pulse," meaning to beat or throb. The base form is pronounced with a /z/ sound, as in "pulz," so the -ed ending is pronounced with a voiced /d/ sound rather than an unvoiced /t/. The IPA transcription for "pulsed" is [pʌlst], with the stress on the first syllable. This spelling rule applies to other verbs ending in -se, such as "dazed" and "fazed."
Pulsed is an adjective that describes the characteristic of something that occurs or operates in a rhythmic, intermittent, or alternating manner. It relates to a series of distinct or periodic pulsations, vibrations, or bursts of activity. The term is commonly used in various fields such as technology, medicine, and physics, among others.
In the technical sense, pulsed refers to a signal or wave that is produced or transmitted in a series of regular or irregular cycles, which can be measured in terms of frequency or time intervals. For instance, a pulsed laser emits brief high-energy bursts of light at regular intervals. Similarly, in electronics, a pulsed current or voltage refers to an electrical signal that alternates between on and off states, providing a burst of energy.
Medical devices such as pacemakers and defibrillators also operate using a pulsed system, where electrical shocks or signals are delivered to the heart in a rhythmic manner to correct irregularities or stimulate contractions.
Furthermore, in the field of physics, pulsed refers to phenomena characterized by intermittent or periodic occurrences, like pulsed magnetic fields used in research or pulsed nuclear reactions observed during specific experiments.
Overall, pulsed denotes a pattern of distinct and often regular bursts or rhythmic intervals of activity, which can be observed in a variety of contexts across different disciplines.
* The statistics data for these misspellings percentages are collected from over 15,411,110 spell check sessions on www.spellchecker.net from Jan 2010 - Jun 2012.
The word "pulsed" is derived from the verb "pulse" which ultimately comes from the Latin word "pulsare". In Latin, "pulsare" means to beat or strike, which is related to the concept of rhythm and pulsation. Over time, the verb "pulse" evolved in English to refer to the rhythmic throbbing or vibrating movement of something. In the context of "pulsed", it typically refers to a series of regular, pulsating actions or signals.
