/// <reference types="node" />
import { Transform, TransformCallback } from "stream";
import { SpectralBuffer } from "../SpectralBuffer";
import { FrequencyBand, Hz, MidiPitch } from "../global";
/** Calculate the (mean-square) intensities for multiply frequency bands given spectral data */
declare class MultiBandIntensities extends Transform {
    frequencyBands: FrequencyBand[];
    bandWidths: Hz[];
    semitoneBandWidths: MidiPitch[];
    constructor(frequencyBands: FrequencyBand[], divideByBandWidth?: boolean);
    _transform(spectrum: SpectralBuffer, encoding: string, callback: TransformCallback): void;
}
export { MultiBandIntensities };