Add decibel level metric to dashboard (#296)

Addresses part of #292

Signed-off-by: Dave Thaler <[email protected]>

Author: dthaler

OrcanodeMonitor/Core/Fetcher.cs

@@ -994,6 +994,7 @@ public async static Task UpdateManifestTimestampAsync(OrcanodeMonitorContext con
             if (frequencyInfo != null)
             {
                 node.AudioStreamStatus = frequencyInfo.Status;
+                node.DecibelLevel = frequencyInfo.GetMaxNonHumDecibels();
             }
             node.AudioStandardDeviation = 0.0;
 

OrcanodeMonitor/Core/FrequencyInfo.cs

@@ -241,6 +241,13 @@ private double GetMaxNonHumMagnitude(Dictionary<double, double> frequencyMagnitu
         /// <returns>Magnitude</returns>
         public double GetMaxNonHumMagnitude(int? channel = null) => GetMaxNonHumMagnitude(GetFrequencyMagnitudes(channel));
 
+        /// <summary>
+        /// Find the maximum decibels outside the audio hum range.
+        /// </summary>
+        /// <param name="channel">Channel, or null for all</param>
+        /// <returns>Magnitude</returns>
+        public double GetMaxNonHumDecibels(int? channel = null) => MagnitudeToDecibels(GetMaxNonHumMagnitude(channel));
+
         /// <summary>
         /// Find the total magnitude outside the audio hum range among a given set of frequency magnitudes.
         /// </summary>

OrcanodeMonitor/Models/Orcanode.cs

@@ -66,6 +66,7 @@ public Orcanode()
             PartitionValue = 1;
             MezmoLogSize = 0;
             MezmoViewId = string.Empty;
+            DecibelLevel = 0;
         }
 
         #region persisted
@@ -175,6 +176,22 @@ public Orcanode()
 
         public double? AudioStandardDeviation { get; set; }
 
+        /// <summary>
+        /// Measure of volume.
+        /// </summary>
+        public double? DecibelLevel { get; set; }
+
+        public string DecibelLevelForDisplay {
+            get
+            {
+                if (DecibelLevel == null || DecibelLevel == 0)
+                {
+                    return "N/A";
+                }
+                return ((int)Math.Round(DecibelLevel ?? 0)).ToString();
+            }
+        }
+
         /// <summary>
         /// Whether the node is visible on the orcasound website.
         /// </summary>

OrcanodeMonitor/Pages/Index.cshtml

@@ -19,6 +19,7 @@
             <th><a href="https://app.mezmo.com/313dbd82f3/logs/view" target="_blank">Mezmo</a></th>
             <th><a href="https://open.quiltdata.com/b/audio-orcasound-net/tree/" target="_blank">S3 Stream</a></th>
             <th>Up%</th>
+            <th>dB</th>
             <th><a href="https://live.orcasound.net/listen" target="_blank">Orcasound</a></th>
             <th><a href="https://aifororcas2.azurewebsites.net/hydrophones" target="_blank">OrcaHello</a></th>
         </tr>
@@ -77,6 +78,9 @@
                     @Model.GetUptimePercentage(item)%
                 </a>
             </td>
+            <td>
+                @Html.DisplayFor(modelItem => item.DecibelLevelForDisplay)
+            </td>
             @if (item.OrcasoundStatus == Models.OrcanodeOnlineStatus.Absent)
             {
                 <td style="background-color: @Model.NodeOrcasoundBackgroundColor(item); color: @Model.NodeOrcasoundTextColor(item)">
@@ -165,6 +169,9 @@
         <li>
             <b>Up%</b>: Percentage of time the S3 Stream has been online over the past week.
         </li>
+        <li>
+            <b>dB</b>: Maximum decibels other than hum.
+        </li>
         <li>
             <b>Orcasound Absent</b>: orcasound.net does not know about the node.
         </li>