Adds artifact test.

config.yaml

@@ -15,3 +15,26 @@ output:
   results_dir: "test_results"
   save_plots: true
   save_raw_audio: false
+
+artifact_detection:
+  test_frequency: 1000  # Hz - Test tone frequency (for sine wave mode)
+  duration: 60.0  # seconds - Recording duration
+  amplitude: 0.5  # 0.0 to 1.0
+  startup_delay: 0  # seconds - Wait before starting recording to let system settle
+  # Chirp signal parameters (used when --signal-type chirp is specified)
+  chirp_f0: 100  # Hz - Chirp start frequency
+  chirp_f1: 8000  # Hz - Chirp end frequency
+  # NOTE: All detectors skip the first 1 second of recording to avoid startup transients
+  detectors:
+    spectral_anomaly:
+      enabled: false  # DISABLED - generates too many false positives, needs better algorithm
+      threshold_db: -60  # Detect unexpected frequencies above noise floor + this threshold (more negative = less sensitive)
+    amplitude_spikes:
+      enabled: true
+      threshold_factor: 4.0  # MAD-based outlier detection on envelope (detects clicks, pops, dropouts). Lower = more sensitive.
+    zero_crossing:
+      enabled: false
+      threshold_factor: 2.0  # Number of standard deviations for zero-crossing anomalies (detects distortion)
+    energy_variation:
+      enabled: false
+      threshold_db: 6.0  # Energy change threshold in dB between consecutive windows (detects level changes)