frequency analysis
[/ˈfriːkwənsi əˈnæləsɪs/]
nounpl: frequency analyses
análise de frequência
1. A cryptanalytic technique that examines the frequency of letters or symbols in an encrypted text to break a cipher
The codebreaker used frequency analysis to decrypt the substitution cipher.
O decodificador usou análise de frequência para descriptografar a cifra de substituição.
2. Statistical examination of how often data values or events occur in a dataset or population
Frequency analysis of customer complaints revealed the most common issues.
A análise de frequência das reclamações dos clientes revelou os problemas mais comuns.
3. In signal processing, the examination of signal components at different frequencies
Frequency analysis of the audio signal showed peaks at specific Hz values.
A análise de frequência do sinal de áudio mostrou picos em valores Hz específicos.
Frequency analysis is a fundamental concept in cryptography with historical significance dating back centuries. It became famous during World War II code-breaking efforts. In Brazilian and Portuguese academic contexts, the term is used identically to English usage, particularly in computer science, mathematics, and engineering disciplines. The technique is foundational in modern data science and cybersecurity education in both Brazil and the United States.
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