What is a spectrogram used for in speech science?

A spectrogram is a powerful tool in speech science that visually represents various aspects of speech sounds, specifically the frequency, intensity, and duration. It displays how sound frequencies vary over time, allowing researchers and clinicians to analyze different components of speech. The x-axis typically represents time, the y-axis represents frequency, and the intensity is often indicated by varying shades of color or brightness. This comprehensive visualization assists in understanding the acoustic properties of speech, which is crucial for evaluating speech production and disorders.

This capability makes spectrograms essential for various applications, including phonetic analysis, speech research, and clinical assessments of speech disorders. They help in diagnosing issues related to articulation and resonance, aiding professionals in devising more effective therapy strategies.

Other choices, while related to aspects of speech, do not accurately describe the primary function of a spectrogram. For instance, measuring vocal fold vibration pertains to laryngeal function and is typically assessed through different methods such as laryngoscopy or electroglottography. Analyzing speech rhythm and determining emotional tone involves more subjective assessments and would not be specifically represented in the spectral output of a spectrogram.