import type { HavsInput, HavsResult } from './types.js';
/**
 * Calculate Hand-Arm Vibration exposure based on ISO 5349 and EU Physical Agents Directive 2002/44/EC.
 *
 * A(8) = sqrt(sum(A_partial²))
 * Where A_partial = a_hv × sqrt(T / T0)
 *
 * Exposure Limits:
 * - EAV (Exposure Action Value) = 2.5 m/s²
 * - ELV (Exposure Limit Value) = 5.0 m/s²
 *
 * @param input - HAVS input parameters with tool exposures
 * @returns HAVS results including A(8), status, and exposure metrics
 * @throws {RangeError} a tool has a negative vibrationMagnitude or exposureTime.
 * @remarks Zero-valued tool entries are treated as unused and filtered out; an empty
 *   (or all-zero) tool list is a valid input that reports no exposure.
 */
export declare function havsCalculate(input: HavsInput): HavsResult;
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