/**
 * Linear distance model.
 *
 * @type {string}
 * @category Sound
 */
export const DISTANCE_LINEAR: string;
/**
 * Inverse distance model.
 *
 * @type {string}
 * @category Sound
 */
export const DISTANCE_INVERSE: string;
/**
 * Exponential distance model.
 *
 * @type {string}
 * @category Sound
 */
export const DISTANCE_EXPONENTIAL: string;