const int sampleRate = 8000;  // Sampling rate (Hz)
const float speedOfSound = 343.0; // Kecepatan suara (m/s)
const float distance = 10.0;   // Jarak antara speaker dan mikrofon (meter)
const int reflectionCount = 5; // Jumlah pantulan
const float reflectionDecay = 0.5; // Pelemahan per pantulan

const int maxIRLength = 1000; // Panjang maksimum impulse response
float impulseResponse[maxIRLength]; // Array untuk menyimpan impulse response

void setup() {
  Serial.begin(115200);
  
  // Inisialisasi array impulse response
  for (int i = 0; i < maxIRLength; i++) {
    impulseResponse[i] = 0.0;
  }
  
  // Hitung delay utama
  int mainDelaySamples = (int)((distance / speedOfSound) * sampleRate);
  if (mainDelaySamples < maxIRLength) {
    impulseResponse[mainDelaySamples] = 1.0 / (distance * distance); // Amplitudo utama
  }
  Serial.print("mainDelaySamples: ");
  Serial.println(mainDelaySamples);

  // Tambahkan pantulan
  for (int i = 1; i <= reflectionCount; i++) {
    float reflectionDistance = distance + i; // Jarak tambahan pantulan
    int reflectionDelaySamples = (int)((reflectionDistance / speedOfSound) * sampleRate);

    if (reflectionDelaySamples < maxIRLength) {
      impulseResponse[reflectionDelaySamples] += 
        (reflectionDecay * i) / (reflectionDistance * reflectionDistance);
    }
  }

  // Tampilkan impulse response
  Serial.println("Impulse Response:");
  for (int i = 0; i < maxIRLength; i++) {
    if (impulseResponse[i] > 0) {
      Serial.print("Sample ");
      Serial.print(i);
      Serial.print(": ");
      Serial.println(impulseResponse[i], 6);
    }
  }
  Serial.println("OK");
}

void loop() {
  // Tidak ada operasi dalam loop
}