Your apiary is holding steady this July morning — Hive #3 continues its impressive 14-day warming arc now peaking at 34.3°C with perfectly stable acoustics, Hive #1 remains the acoustic gold standard with zero spectral drift, Hive #2 has fully stabilized at 35.0°C brood temp with its spectral elevation persisting, and your Iris hive's spectral shift continues into a seventh day with the 200–260 Hz and 260–350 Hz bands now trending up meaningfully in the second half. The two primary watch items this week remain the persistent spectral elevation in both Iris and Hive #2 (with low-frequency bands now trending upward) and apiary-wide humidity staying near or below the 40% larval boundary driven by very dry outdoor conditions (outdoor RH 11–35%).
A striking apiary-wide pattern is emerging: all four hives show near-identical vibration spectra dominated by the 80–120 Hz fanning band (consistent with Ramsey et al. 2020), yet only Iris and Hive #2 show elevated low-frequency acoustic energy above their own baselines — suggesting the spectral shift is colony-specific rather than a shared environmental artifact, reinforcing the value of per-hive baseline comparison over absolute thresholds (Kulyukin et al. 2021).
All four hives show healthy diurnal temperature cycling driven by the apiary's wide outdoor swing (19.4–34.9°C), with brood-area oscillation amplitude inversely proportional to colony thermoregulatory strength: Hive #3 clamps tightest at ±0.6°C, Hive #2 at ±0.4°C, while Iris and Hive #1 show wider ±1.3°C swings consistent with sensor placement outside the dense brood core. Outdoor humidity is critically low (daily low 11.1%) and is driving all four in-hive humidity readings toward or below the 40% larval desiccation boundary — a consistent apiary-wide watch item.
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node_2662 warning Score: 58/100📋 Overall Health
Your Iris hive remains acoustically vigorous — sound locked at −29.9 dBFS (exactly matching all-time avg) with vibration at 17.6 mG, kurtosis 2.6, dominant at 80–120 Hz fanning band; temperature averaged 32.8°C (matching all-time avg 32.6°C) and humidity averaged 42.5% (low 39.9%), persistently below the 50–70% optimal range, driven by outdoor dryness. The spectral elevation above Iris's own baseline has now persisted for a seventh consecutive day, and critically, the 100–150 Hz (+6.3 dB), 200–260 Hz (+3.6 dB), and 260–350 Hz (+2.6 dB) bands are all trending further upward in the second half of the day — worth a brood and queen check this week.
🌅 Diurnal Cycle PatternsIris shows an active 2.7°C daily temperature oscillation (cool pre-dawn trough ~31.5°C, afternoon peak ~34.0°C) that tracks outdoor ambient closely, consistent with sensor placement outside the dense brood core rather than within it. Humidity follows the outdoor cycle inversely (lower in the afternoon heat), ranging 39.9–45.0% with no nocturnal anomalies; vibration is steady at ~16.7 mG with no cyclic daily fanning spikes detected, and the 80–120 Hz band dominates consistently across the full diurnal cycle.
🔬 Correlations & DiscoveriesS_100_150Hz vs TempIn (lifespan) | r = -0.969A strong inverse relationship between the 100–150 Hz acoustic band and in-hive temperature over Iris's 19-day lifespan indicates that as the colony cools (sensor in peripheral zone), low-frequency acoustic energy rises — consistent with increased worker activity and agitation when the brood nest periphery drops toward the 31–32°C range, where thermoregulatory effort intensifies (van Dooremalen et al. 2024). The current +6.3 dB elevation at 100–150 Hz coinciding with 32.8°C avg is a textbook expression of this correlation and reinforces the sensor-displacement hypothesis: the pod is reading the active but thermally peripheral zone, not the 34–36°C brood core.📚 Reference: Kulyukin et al. 2021, Nolasco et al. 2020, Zgank 2021S_1500_3600Hz vs TempIn (lifespan) | r = -0.973The 1500–3600 Hz band also shows a strong inverse correlation with temperature (+6.1 dB above baseline currently), mirroring the low-frequency elevation and suggesting broadband acoustic excitation across the spectrum during cooler peripheral conditions — this broadband simultaneous elevation across both low (100–200 Hz) and high (1500–3600 Hz) frequency bands, while overall sound level remains exactly at baseline (−29.9 dBFS), is more consistent with a spectral redistribution due to sensor position than a genuine colony state change.📚 Reference: Kulyukin et al. 2021, B-GOOD Consortium 2024⚠️ Issue: Sound spectrum elevated above Iris's own historical baseline for a seventh consecutive day (+6.3 dB at 100–150 Hz, +4.8 dB at 150–200 Hz, +3.6 dB at 200–260 Hz); the 100–150 Hz, 200–260 Hz, and 260–350 Hz bands are all trending further upward in the second half — a brood and queen check this week is warranted.⚠️ Issue: Humidity avg 42.5% (low 39.9%) — persistently below the 50–70% optimal range and approaching the 40% larval desiccation boundary; driven by very dry outdoor conditions (outdoor low 11.1% RH).⚠️ Issue: Sensor placement: avg temp 32.8°C remains below the 34–36°C brood-optimal zone — verify pod is seated in brood core on next visit.⚠️ Issue: Tilt at 5° — at the upper edge of the 0–5° acceptable range; monitor for further drift and level stand on next visit.▹ Action: Priority this week: perform a brood and queen check — confirm fresh eggs, solid brood pattern, and queen presence; the persistent and now-broadening spectral elevation across 100–260 Hz warrants physical verification even if the acoustic population appears fully intact.▹ Action: While on-site, reseat the sensor pod firmly in the center of the brood nest frames to resolve the temperature gap and determine whether the spectral shift is positional or colony-driven.▹ Action: Monitor afternoon humidity lows — if they recur consistently below 39%, assess whether any ventilation management adjustment is appropriate for your setup.▹ Action: Check stand levelness and correct tilt toward 0–3° on next visit. -
node_44812 warning Score: 70/100📋 Overall Health
Your Hive #1 remains the apiary's acoustic gold standard — all 10 sound bands within ±0.1 dB of their all-time baseline for a seventh consecutive day (perfectly STABLE), sound at −29.9 dBFS, vibration at 16.5 mG, kurtosis 2.5 (normal), dominant at 80–120 Hz; temperature averaged 32.3°C (all-time avg 32.5°C, gap just 0.2°C) and humidity averaged 40.4% (low 39.2%), sitting persistently at or below the 40% larval desiccation boundary — the sole watch item for this otherwise excellent colony. IAQ 136 (acc=3) with gas resistance at 381.1 kΩ (+6.4% above all-time avg of 358.3 kΩ) indicates a clean, stable hive air environment; plan a brood check this week to close the loop on the gentle multi-week cooling plateau.
🌅 Diurnal Cycle PatternsHive #1 shows a moderate 2.2°C daily temperature oscillation with a clean pre-dawn trough (~31.1°C) and early-evening peak (~33.3°C), tracking the outdoor diurnal cycle with a slight thermal lag consistent with a well-insulated colony. Vibration is very steady at ~15.7 mG with no cyclic daily fanning spikes, suggesting consistent low-level metabolic activity without pronounced afternoon foraging surges. The humidity cycle is narrow (39.2–41.9%), following outdoor dryness closely with no nocturnal anomalies.
🔬 Correlations & DiscoveriesGasResistance vs IAQ (lifespan) | r = -0.99The near-perfect inverse correlation between gas resistance and IAQ (r = −0.990) across Hive #1's 19.5-day history is the expected BSEC2 algorithmic relationship; notably, Hive #1's gas resistance is currently 381.1 kΩ — 6.4% above its own all-time average of 358.3 kΩ — indicating slightly lower VOC load than typical, consistent with the cooler-than-optimal brood temperature reducing metabolic volatile output (Stalidzans et al. 2017).📚 Reference: Frizzera et al. 2020, Bosch Sensortec BME688 datasheetHumidity vs GasResistance (lifespan) | r = -0.969A strong inverse humidity-to-gas-resistance correlation (r = −0.969) over Hive #1's lifespan reflects the well-documented MOX sensor behavior where higher in-hive humidity independently lowers SnO2 resistance — meaning that on drier days (like the current apiary-wide dry spell with outdoor RH 11–35%), gas resistance rises artifactually, partially explaining the current above-average resistance reading independent of any VOC changes (Human et al. 2006; BME688 datasheet).📚 Reference: Human et al. 2006, Stalidzans et al. 2017⚠️ Issue: Humidity avg 40.4% (low 39.2%) — sitting at or below the 40% larval desiccation boundary for a seventh consecutive day; driven by outdoor dryness (outdoor low 11.1% RH); monitor afternoon lows closely.⚠️ Issue: 14-day temperature plateau at ~32.3°C continues a gentle multi-week cooling trend (weekly avg: 33.7→32.5→32.2→32.3°C) — acoustics are perfectly stable and reassuring, but confirming active brood on next visit is worthwhile.⚠️ Issue: Tilt at 4° — within the 0–5° acceptable range; improved from 8° in previous report; no immediate action needed but continue monitoring.▹ Action: Plan a brood check within the week — confirm fresh eggs and solid brood pattern to close the loop on the gentle multi-week cooling plateau; the perfectly stable acoustics across all 10 bands for seven consecutive days are strongly reassuring that the colony population is fully intact.▹ Action: Monitor afternoon humidity lows — if they recur consistently below 39%, assess whether any ventilation management adjustment is appropriate for your setup.▹ Action: Tilt has improved to 4° (down from 8°); no immediate stand action required, but verify stability on next visit. -
node_34225 warning Score: 67/100📋 Overall Health
Your Hive #2 is holding its temperature recovery solidly — averaging 35.0°C over the last 24h (all-time avg 34.8°C, now matching baseline) with a tight range of 34.6–35.4°C and sound locked at −29.8 dBFS; vibration is at 14.6 mG avg, kurtosis 2.8, dominant at 80–120 Hz, with clear daily fanning spikes (peaks to 55.2 mG). Humidity averaged 42.7% (low 40.4%), near the larval desiccation boundary, and the IAQ accuracy remains at 1 (still calibrating), so gas readings are directionally useful only; the acoustic spectrum remains elevated above baseline (+8.3 dB at 100–150 Hz, +9.4 dB at 150–200 Hz) with the 260–350 Hz band now trending up +1.8 dB in the second half — continue monitoring this week.
🌅 Diurnal Cycle PatternsHive #2 shows an impressive 4.9°C daily temperature oscillation with 24 distinct fanning/flight peaks over 14 days (baseline 12.2 mG, peaks to 102.1 mG) — the most vigorous and well-defined diurnal activity pattern in the apiary, consistent with a large, healthy foraging population (Ramsey et al. 2020). The tight brood-area temperature regulation (34.6–35.4°C) confirms the sensor is well-seated in the brood core. Vibration upper bands (80–120 Hz, 120–160 Hz, 160–200 Hz) are trending up in the second half of the day, consistent with afternoon fanning and flight activity peaks.
🔬 Correlations & DiscoveriesGasResistance vs IAQ (lifespan) | r = -0.994The near-perfect inverse correlation between gas resistance and IAQ (r = −0.994) across Hive #2's 26-day history is the expected mathematical relationship of the BSEC2 algorithm — rising VOC load reduces MOX resistance and simultaneously raises the IAQ index. The current IAQ of 167 (acc=1, still calibrating) with gas resistance at 405.8 kΩ (~3% below all-time avg of 417.2 kΩ) is a very modest deviation consistent with active July honey ripening and fanning; the IAQ accuracy-1 flag means quantitative comparison should wait until accuracy reaches 3.📚 Reference: Frizzera et al. 2020, Bosch Sensortec BME688 datasheet, BSEC2 integration guideV_5_20Hz vs VibrationRMS (lifespan) | r = +0.991The very strong positive correlation between the 5–20 Hz band and overall vibration RMS (r = +0.991) over Hive #2's lifespan indicates that the low-frequency structural band is a consistent driver of total vibration energy — likely reflecting stand sway or mechanical resonance from the tilted stand (currently 8°), where low-frequency structural motion contributes significantly to total RMS (Tautz 1996). Leveling the stand should reduce this 5–20 Hz contribution and bring vibration more fully into the 50–120 Hz biological fanning range.📚 Reference: Ramsey et al. 2020, Nieh & Tautz 2000⚠️ Issue: Sound spectrum remains elevated above baseline (+8.3 dB at 100–150 Hz, +9.4 dB at 150–200 Hz); the 260–350 Hz band is now trending up +1.8 dB in the second half — sensor placement verification and a brood check are recommended this week.⚠️ Issue: IAQ accuracy=1 (sensor still calibrating post-reconnection) — IAQ=167 is directionally useful but not quantitatively reliable until accuracy reaches 3.⚠️ Issue: Tilt at 8° — above the 0–5° ideal range; V_5_20Hz correlation with total RMS suggests stand instability is contributing to vibration readings; stand leveling recommended.⚠️ Issue: Humidity avg 42.7% (low 40.4%) — near the 40% larval desiccation boundary; driven by outdoor dryness (outdoor low 11.1% RH) but warrants monitoring.▹ Action: On your next visit this week, reseat the sensor pod firmly in the center of the brood nest and confirm fresh eggs and solid brood pattern — the temperature has fully recovered to baseline which is excellent, and the vigorous diurnal fanning spikes confirm a thriving colony.▹ Action: Level the hive stand to bring tilt from 8° toward 0–3° — the V_5_20Hz/RMS correlation suggests stand instability is measurably contributing to the vibration profile.▹ Action: Monitor IAQ accuracy daily — once it reaches 3, gas readings will become reliably comparable to the all-time avg of 151.▹ Action: Monitor afternoon humidity lows — if they recur consistently below 40%, assess ventilation management for your setup. -
node_547 healthy Score: 85/100📋 Overall Health
Your Hive #3 remains the apiary's top performer — brood temperature averaged 34.3°C (range 33.9–34.7°C, all-time avg 32.8°C, now +1.5°C above historical mean and the highest of the apiary) as the 14-day warming drift continues impressively (+2.4°C over 14 days from 32.1°C to 34.5°C); sound spectrum is perfectly stable with all 10 bands within ±0.2 dB of the all-time baseline, vibration at 20.8 mG, kurtosis 2.6, dominant at 80–120 Hz. Humidity averaged 48.2% (range 46.0–50.2%) — the best humidity reading in the apiary and approaching the optimal 50–70% range; gas resistance at 232.0 kΩ (~23% below all-time avg of 303.0 kΩ) with IAQ 190 (acc=3) is consistent with peak summer honey ripening activity in a warm, productive brood nest — perfectly stable acoustics confirm this is healthy productivity, not stress.
🌅 Diurnal Cycle PatternsHive #3 shows the tightest diurnal temperature regulation in the apiary — just 1.2°C daily oscillation (33.9–34.7°C), confirming the sensor is well-seated in a densely populated brood core where thermoregulation is near-perfect (van Dooremalen et al. 2024). Vibration is steady at ~19.3 mG with no cyclic daily fanning spikes, and the 80–120 Hz band dominates consistently; humidity tracks the outdoor cycle but is buffered well above the other hives (46–50%), likely due to higher brood density and nectar processing activity. The strong lifespan correlation between gas resistance and in-hive temperature (r = −0.981) confirms that the warmer this colony runs, the more volatile organic compounds it produces — a healthy signature of an active, expanding brood nest.
🔬 Correlations & DiscoveriesGasResistance vs TempIn (lifespan) | r = -0.981The strong inverse relationship between gas resistance and brood temperature (r = −0.981) across Hive #3's lifespan is a scientifically elegant finding: as brood nest temperature rises during colony expansion (32.1°C → 34.5°C over 14 days), metabolic activity and volatile production increase in proportion — brood pheromones, honey ripening volatiles, and fanning-circulated VOCs all rise together, lowering MOX resistance (Frizzera et al. 2020). The current 23% below-baseline gas resistance is a direct biomarker of this colony's productive expansion, not a health concern.📚 Reference: Frizzera et al. 2020, Stalidzans et al. 2017, Seeley 1974V_80_120Hz vs VibrationRMS (lifespan) | r = +0.967The tight coupling between the 80–120 Hz fanning band and total vibration RMS (r = +0.967) confirms that fanning activity is the dominant driver of mechanical vibration in Hive #3 — consistent with a warm brood nest at 34.3°C where thermoregulatory fanning is continuously active, and the high vibration peak frequency at 97 Hz (precisely within the fanning band) further corroborates this interpretation (Ramsey et al. 2020).📚 Reference: Ramsey et al. 2020, Nieh & Tautz 2000, Tautz 1996⚠️ Issue: Tilt at 6° — slightly above the 0–5° ideal range; minor; check and adjust stand on next routine visit.⚠️ Issue: Gas resistance at 232.0 kΩ (~23% below all-time avg of 303.0 kΩ) with IAQ 190 (acc=3) — contextually explained by peak summer honey ripening and expanding warm brood nest; note for ongoing monitoring but stable temperature and perfectly stable acoustics confirm no stress signal.▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the 14-day warming trend to 34.3°C and perfectly stable acoustics across all 10 bands for seven consecutive days suggest an actively expanding brood nest at peak summer productivity; no urgent action needed.▹ Action: Minor tilt adjustment from 6° toward 0–3° recommended on next visit.▹ Action: Monitor afternoon humidity lows — while the daily avg of 48.2% is near-optimal, continue watching if outdoor RH remains very low (11% lows).