import type { _NSCopying } from "../Foundation/NSCopying.js";
import type { _NSObject } from "../Foundation/NSObject.js";
import type { _NSSecureCoding } from "../Foundation/NSSecureCoding.js";
import type { _SFAcousticFeature } from "./SFAcousticFeature.js";
export declare class _SFVoiceAnalytics extends _NSObject {
    static alloc(): _SFVoiceAnalytics;
    static new(): _SFVoiceAnalytics;
    init(): _SFVoiceAnalytics;
    /**
     * The variation in pitch in each frame of a transcription segment, expressed as a percentage of the frame's fundamental frequency. Jitter measures vocal stability and is measured as an absolute difference between consecutive periods, divided by the average period. It is expressed as a percentage
     */
    jitter(): _SFAcousticFeature;
    /**
     * The variation in vocal volume stability (amplitude) in each frame of a transcription segment, expressed in decibels.
     */
    shimmer(): _SFAcousticFeature;
    /**
     * The highness or lowness of the tone (fundamental frequency) in each frame of a transcription segment, expressed as a logarithm. The value is a logarithm (base `e`) of the normalized pitch estimate for each frame.
     */
    pitch(): _SFAcousticFeature;
    /**
     * The likelihood of a voice in each frame of a transcription segment. The `voicing` value is expressed as a probability in the range `[0.0, 1.0]`. Voicing measures the probability of whether a frame is voiced or not and is measured as a probability
     */
    voicing(): _SFAcousticFeature;
}
export interface _SFVoiceAnalytics extends _NSCopying, _NSSecureCoding {
}
