/// <reference types="node" />
import { SpectralBuffer } from "../SpectralBuffer";
import { Transform, TransformCallback } from "stream";
/** Measure the intensity of a given frequency band in a SpectralBuffer stream. */
declare class SpectralBandIntensity extends Transform {
    lowerBound: number;
    upperBound: number;
    constructor(lowerBound?: number, upperBound?: number);
    _transform(spectrum: SpectralBuffer, encoding: string, callback: TransformCallback): void;
}
export { SpectralBandIntensity };