ParticleSoundSystem-Template

using System.Collections.Generic;
using UnityEngine;
using System.Linq;

[RequireComponent(typeof(ParticleSystem))]
public class FireworksParticleSoundSystem : MonoBehaviour
{
    private ParticleSystem _parentParticleSystem;

    private IDictionary<uint, ParticleSystem.Particle> _trackedParticles = new Dictionary<uint, ParticleSystem.Particle>();

    void Start()
    {
        _parentParticleSystem = this.GetComponent<ParticleSystem>();
        if (_parentParticleSystem == null)
            Debug.LogError("Missing ParticleSystem!", this);
    }

    void Update()
    {
        var liveParticles       = new ParticleSystem.Particle[_parentParticleSystem.particleCount];
        _parentParticleSystem.GetParticles(liveParticles);

        var particleDelta       = GetParticleDelta(liveParticles);

        foreach (var particleAdded in particleDelta.Added)
        {
            //Todo: Play "Spawn" sound - use particleAdded.position to play at right position
            Debug.Log($"New particle spawned '{particleAdded.randomSeed}' at position '{particleAdded.position}'");
        }

        foreach (var particleRemoved in particleDelta.Removed)
        {
            //Todo: Play "Disappear" sound - use particleRemoved.position to play at right position
            Debug.Log($"Particle despawned '{particleRemoved.randomSeed}' at position '{particleRemoved.position}'");
        }
    }

    private ParticleDelta GetParticleDelta(ParticleSystem.Particle[] liveParticles)
    {
        var deltaResult = new ParticleDelta();

        foreach (var activeParticle in liveParticles)
        {
            ParticleSystem.Particle foundParticle;
            if(_trackedParticles.TryGetValue(activeParticle.randomSeed, out foundParticle))
            {
                _trackedParticles[activeParticle.randomSeed] = activeParticle;
            }
            else
            {
                deltaResult.Added.Add(activeParticle);
                _trackedParticles.Add(activeParticle.randomSeed, activeParticle);
            }
        }

        var updatedParticleAsDictionary = liveParticles.ToDictionary(x => x.randomSeed, x => x);
        var dictionaryKeysAsList = _trackedParticles.Keys.ToList();

        foreach (var dictionaryKey in dictionaryKeysAsList)
        {
            if (updatedParticleAsDictionary.ContainsKey(dictionaryKey) == false)
            {
                deltaResult.Removed.Add(_trackedParticles[dictionaryKey]);
                _trackedParticles.Remove(dictionaryKey);
            }
        }
        
        return deltaResult;
    }

    private class ParticleDelta
    {
        public IList<ParticleSystem.Particle> Added     { get; set; }   = new List<ParticleSystem.Particle>();
        public IList<ParticleSystem.Particle> Removed   { get; set; }   = new List<ParticleSystem.Particle>();
    }
}

I call the emit method in the script to emit particles, and then calculate the start and end positions in real time, and set the delay of playing sound effects or special effects.