Definition

Noun: - The lowest frequency in a harmonic series: The fundamental frequency is the lowest, base frequency at which a system naturally vibrates. It is the primary pitch perceived when a musical note or sound is produced, and all higher frequencies (overtones or harmonics) in the series are integer multiples of this base frequency.

Usage

The term is used primarily in physics, acoustics, music theory, and engineering to describe the base component of a complex sound wave. - The fundamental frequency of a guitar string determines the note we hear. - In voice analysis, the fundamental frequency is related to the perceived pitch of speech.

Advanced Usage

• In signal processing: The fundamental frequency is a key parameter for analyzing and synthesizing periodic signals.
  • The algorithm failed to correctly identify the fundamental frequency of the corrupted audio signal.

Variants and Related Words

• Fundamental (noun): Often used synonymously with "fundamental frequency" in technical contexts.
  • The fundamental of this vibrating string is 440 Hz.
• First harmonic: A direct synonym for the fundamental frequency in a harmonic series.
• Pitch: While related to the perceptual correlate of frequency, "pitch" is a psychoacoustic term, whereas "fundamental frequency" is a physical measurement.

Synonyms

• Base frequency
• First harmonic

Related Phrases

• Missing fundamental: A psychoacoustic phenomenon where the perceived pitch corresponds to a fundamental frequency that is not physically present in the sound wave.
  • The telephone system creates a missing fundamental, allowing us to hear low pitches despite technical limitations.

Noun

1. the lowest tone of a harmonic series