frequency response

Thân thiện

A technician analyzes the frequency response on an oscilloscope screen.

Definition

Noun: 1. A technical specification in electronics and audio engineering: A graph or set of data that shows how a device (such as an amplifier, microphone, or speaker) responds to different frequencies of an input signal. It specifically measures the ratio of the output signal's amplitude to the input signal's amplitude across a range of frequencies. 2. A measure of fidelity and performance: It describes which frequencies a device can reproduce accurately and which ones it amplifies or attenuates (weakens). A "flat" frequency response indicates the device treats all frequencies equally.

Examples of Usage

• Noun:
  • The engineer analyzed the frequency response of the new speaker design to identify any unwanted resonances.
  • A microphone with a flat frequency response is preferred for recording acoustic instruments accurately.
  • The headphone's frequency response shows a significant boost in the bass frequencies.

Advanced Usage

• "to measure the frequency response": To perform a test to determine the frequency response characteristics of a device.
  • We need to measure the frequency response of this filter circuit.
• "frequency response curve": The graphical plot of the frequency response data.
  • The frequency response curve revealed a sharp drop-off at high frequencies.

Variants and Related Words

• Frequency Response Function (FRF) (n): A more formal term used in systems engineering and vibration analysis to describe the relationship between input and output in the frequency domain.
• Impulse Response (n): A related measurement in the time domain that can be mathematically converted to show the frequency response.
• Bandwidth (n): Closely related; it often describes the range of frequencies within the frequency response where the device performs within specified limits (e.g., the -3 dB points).

Synonyms

• Transfer function (magnitude): In engineering, the frequency response often refers to the magnitude (amplitude) portion of the complete transfer function.
• Spectral response: A less common synonym emphasizing the response across the frequency spectrum.

Related Phrases

• Flat frequency response: A desired characteristic where the output level is consistent across all frequencies, indicating accurate reproduction.
  • Studio monitors aim for a flat frequency response.
• Frequency response deviation: The amount by which the response curve differs from a specified ideal (like a flat line).
  • The specification sheet lists the frequency response deviation as ±2 dB.

Học thuật

Noun

1. (electronics) a curve representing the output-to-input ratio of a transducer as a function of frequency