Your apiary is in solid shape this July morning — Hive #3 continues as top performer with brood temp locked at 34.4°C and perfectly stable acoustics, Hive #2 holds its excellent 34.9°C thermoregulation with vigorous daily fanning peaks, and Hive #1 remains the acoustic gold standard for a tenth consecutive day. The two ongoing watch items are the persistent broad-spectrum acoustic elevation in Iris and Hive #2 (now entering a tenth day), and apiary-wide humidity remaining below the 50–70% brood-optimal range driven by very dry outdoor conditions (outdoor RH 13–41%).
Across Iris and Hive #2, the persistent multi-band acoustic elevation (100–200 Hz and 1500–3600 Hz simultaneously shifted +5–8.5 dB above their own baselines for 10 days) represents a textbook broadened spectral profile consistent with pre-swarm energy migration described by Ramsey et al. 2020 and Woods 1959 — yet both hives maintain stable overall sound levels and stable temperatures, making a completed swarm unlikely and suggesting heightened colony arousal or sensor placement as the more probable explanation. Hive #3's strong negative GasResistance–TempIn correlation (r = −0.984 over lifespan) elegantly confirms that its warmest-in-apiary brood core at 34.4°C is directly driving the highest VOC throughput via honey ripening and metabolic activity — a healthy productivity signal, not a stress indicator.
All four hives continue healthy diurnal temperature cycling driven by the apiary's wide outdoor swing (18.9–34.9°C); thermoregulatory clamping strength continues to inversely predict brood-core proximity — Hive #3 clamps tightest at ±0.35°C (34.0–34.7°C, sensor confirmed in brood core), Hive #2 at ±0.45°C, while Iris and Hive #1 show wider ±1.1°C and ±1.2°C oscillations respectively, consistent with peripheral sensor placement. Outdoor humidity remains critically low (daily low 13.5%), continuing to suppress all four in-hive humidity readings below the 50–70% optimal range.
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node_2662 warning Score: 55/100📋 Overall Health
Your Iris hive remains acoustically vigorous — sound locked at −29.9 dBFS (matching all-time avg exactly) with the broad-spectrum elevation now entering a tenth consecutive day: 100–150 Hz at +6.8 dB (slight easing from yesterday's +7.2 dB peak), 150–200 Hz at +5.1 dB, 200–260 Hz at +3.5 dB, and notably the 800–1500 Hz and 1500–3600 Hz bands are also elevated (+4.0 and +6.4 dB respectively), suggesting full-spectrum acoustic arousal rather than a narrowly targeted biological signal. Temperature averaged 32.5°C (all-time avg 32.3°C, on baseline), humidity averaged 46.1% (improved from 45.0% yesterday and now closer to the 50–70% optimal range), vibration at 18.0 mG avg with kurtosis 2.5 (calm, no impulsive events), and a brood and queen check this week remains the priority to physically determine whether this spectral shift is positional or colony-driven.
🌅 Diurnal Cycle PatternsIris shows a healthy ±1.1°C diurnal temperature oscillation (31.4–33.6°C over 24h), consistent with a peripheral sensor placement relative to the brood core; the daily temperature arc peaks mid-afternoon in sync with outdoor heat, confirming normal thermoregulatory coupling. Humidity improved slightly to an avg of 46.1% (range 44.1–47.9%), still below the 50–70% brood-optimal zone but tracking upward day-over-day — the very dry outdoor conditions (outdoor low 13.5% RH) continue to be the primary driver of below-optimal in-hive humidity. Vibration remains steady at ~18.0 mG with no cyclic daily fanning peaks detected and kurtosis 2.5 (slightly below the normal ~3.0 baseline, indicating a smooth, calm vibrational environment). The broad-spectrum acoustic elevation persists across all measured days with no sign of resolving.
🔬 Correlations & DiscoveriesS_1500_3600Hz vs TempIn (lifespan) | r = -0.974The strong negative lifetime correlation between the 1500–3600 Hz acoustic band and in-hive temperature (r = −0.974) in Iris is intriguing: as temperature rises (warmer brood periods), high-frequency acoustic energy tends to decrease, and vice versa. This likely reflects that during cooler peripheral periods the colony's acoustic profile broadens into higher frequencies (defensive alertness, fanning), while peak brood warmth correlates with more settled, lower-frequency hum — a pattern consistent with ML lifecycle classification findings (Zgank 2021). The current 24h elevation of +6.4 dB at 1500–3600 Hz alongside a cooler-than-brood-core temperature of 32.5°C fits this inverse relationship and further supports the sensor being in a peripheral, cooler zone of the hive.📚 Reference: Kulyukin et al. 2021, Nolasco et al. 2020, Zgank 2021S_100_150Hz vs TempIn (lifespan) | r = -0.971The parallel inverse correlation between the 100–150 Hz colony baseline hum band and temperature (r = −0.971) reinforces the same peripheral-placement hypothesis: this low-frequency band elevation (+6.8 dB above baseline, now day 10) tracks with cooler sensor temperatures, suggesting that when the sensor is further from the brood core, the colony's low-frequency vibrational hum registers more prominently without the thermal signature of the brood nest to accompany it. Per Ramsey et al. 2020, pre-swarm energy increases in the 100–200 Hz band days before departure — however, the absence of any drop in overall sound energy or temperature makes an active swarm event inconsistent with this data.📚 Reference: Ramsey et al. 2020, Woods 1959⚠️ Issue: Broad-spectrum acoustic elevation persists for a tenth consecutive day above Iris's own historical baseline — 100–150 Hz: +6.8 dB, 150–200 Hz: +5.1 dB, 200–260 Hz: +3.5 dB, 800–1500 Hz: +4.0 dB, 1500–3600 Hz: +6.4 dB — full-spectrum pattern warrants a brood and queen check this week.⚠️ Issue: Humidity avg 46.1% (low 44.1%) — below the 50–70% brood-optimal range; driven by very dry outdoor conditions (outdoor low 13.5% RH).⚠️ Issue: Tilt at 8° — above the 0–5° acceptable range; stable from yesterday; level stand on next visit.⚠️ Issue: Sensor placement: avg temp 32.5°C remains below the 34–36°C brood-optimal zone — verify pod is seated in brood core on next visit.▹ Action: Priority this week: perform a brood and queen check — confirm fresh eggs, solid brood pattern, and queen presence; the persistent full-spectrum acoustic elevation for ten consecutive days warrants physical verification.▹ 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: Correct stand tilt from 8° toward 0–3° on next visit.▹ Action: Monitor humidity — avg is improving (46.1% vs 45.0% yesterday) but watch that afternoon lows stay above 44%. -
node_44812 warning Score: 72/100📋 Overall Health
Your Hive #1 remains the apiary's acoustic gold standard for a tenth consecutive day — all 10 sound bands within ±0.1 dB of their all-time baseline (perfectly STABLE), sound at −29.9 dBFS (matching all-time avg), vibration at 16.3 mG avg, kurtosis 2.9 (normal), dominant vibration at 80–120 Hz; temperature averaged 31.9°C (all-time avg 32.3°C, gentle 0.4°C below baseline) with a 24h range of 30.6–33.0°C reflecting peripheral sensor placement, and humidity averaged 40.5% (low 39.1%) — just above the 40% larval desiccation boundary and still the driest in the apiary. Gas resistance at 389 kΩ is +7% above the all-time avg of 364 kΩ (IAQ 140 vs all-time avg 156), suggesting a slightly cleaner hive air environment than historical norm — a reassuring rather than concerning observation; plan a brood check this week to close the loop on the gentle multi-week temperature plateau.
🌅 Diurnal Cycle PatternsHive #1 shows a healthy ±1.2°C diurnal temperature oscillation (30.6–33.0°C), consistent with a peripheral sensor placement; the daily arc follows outdoor temperature closely, bottoming out in the pre-dawn hours and recovering through the afternoon. Humidity tracks tightly between 39.1% (afternoon low) and 42.1% (nighttime high), averaging 40.5% — the critical watch point is that afternoon lows are consistently touching the 39–40% range, just above the 40% larval desiccation threshold (Human et al. 2006). Vibration is steady around 16.3 mG with no cyclic daily fanning peaks detected and kurtosis 2.9 (normal); all six vibration spectral bins are within ±0.2 dB of their all-time baselines, indicating a mechanically stable and undisturbed hive. The 14-day acoustic spectrogram remains perfectly flat — a consistently reassuring signal.
🔬 Correlations & DiscoveriesHumidity vs GasResistance (lifespan) | r = -0.963The strong negative lifetime correlation between in-hive humidity and gas resistance (r = −0.963) in Hive #1 reveals that as humidity rises (nighttime peaks, cooler mornings), gas resistance falls — consistent with the known MOX sensor behavior where water vapor directly affects the SnO2 sensing layer's resistance independently of VOC concentration. This humidity-driven resistance variation partially explains the IAQ readings in this hive and is a calibration artifact rather than a colony health signal; it underscores the importance of always comparing gas readings against this hive's own humidity-corrected baseline rather than absolute thresholds.📚 Reference: Human et al. 2006, Stalidzans et al. 2017, Cepero et al. 2023Humidity vs IAQ (lifespan) | r = +0.938The corresponding strong positive correlation between humidity and IAQ (r = +0.938) confirms that BSEC2 in this hive's sensor is detecting humidity-modulated resistance changes and incorporating them into the IAQ score — when humidity rises at night, IAQ rises not because air quality worsens but because the MOX baseline shifts with moisture. This is a well-documented BSEC2 behavior in high-humidity environments and validates that Hive #1's IAQ readings (avg 140, acc=3) should be interpreted primarily as a humidity-correlated signal, with true VOC anomalies only identifiable when gas resistance deviates beyond what humidity alone would explain.📚 Reference: Ellis & Delaplane 2008, Bosch Sensortec BSEC2 integration guide⚠️ Issue: Humidity avg 40.5% (low 39.1%) — just above the 40% larval desiccation boundary and the lowest in the apiary; driven by very dry outdoor conditions (outdoor low 13.5% RH); monitor afternoon lows closely.⚠️ Issue: 14-day temperature plateau at ~31.9–32.3°C continues (weekly avg: 34.0→32.5→32.2→32.1°C) — acoustics are perfectly stable and reassuring, but confirming active brood on next visit is worthwhile.⚠️ Issue: Tilt at 5° — at the upper edge of acceptable range; verify stand stability on next visit.▹ 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 ten consecutive days strongly reassure that the colony population is fully intact.▹ Action: Monitor afternoon humidity lows — if they recur below 39%, consider whether any ventilation management adjustment is appropriate for your setup.▹ Action: Verify stand stability and nudge tilt toward 0–3° if easy to do on next visit. -
node_34225 warning Score: 72/100📋 Overall Health
Your Hive #2 continues its outstanding temperature performance — averaging 34.9°C over 24h (all-time avg 34.9°C, perfectly on baseline) with a tight 34.4–35.3°C range demonstrating excellent brood nest thermoregulation for a tenth consecutive day; sound is locked at −29.8 dBFS (matching all-time avg) with vibration at 14.5 mG avg, kurtosis 2.9 (normal), dominant at 80–120 Hz and vigorous daily fanning peaks to 52.7 mG. Humidity averaged 45.5% (range 41.5–49.2%), below the 50–70% optimal range but driven by the very dry outdoor conditions (outdoor low 13.5%), and the broad-spectrum acoustic elevation persists into day ten (+6.5 dB at 100–150 Hz, +8.5 dB at 150–200 Hz) — a sensor reseat and brood check this week remain recommended.
🌅 Diurnal Cycle PatternsHive #2 shows the tightest diurnal temperature clamping in the apiary at ±0.45°C (34.4–35.3°C), confirming the sensor is seated near the active brood core; this compressed oscillation is a textbook healthy brood nest signature (van Dooremalen et al. 2024). Humidity tracks a healthy diurnal arc from 41.5% (afternoon low, when outdoor RH hits its daily minimum) to 49.2% (nighttime high), averaging 45.5% — still below optimal but showing good daily recovery. The vibration profile shows clear daily cyclic fanning/flight peaks (24 confirmed daily spikes over 14 days, rising from ~12 mG baseline to 52.7 mG peaks today), a normal and healthy thermoregulation/foraging diurnal schedule per Hrncir et al. 2011. The low-frequency vibration bands (5–20 Hz and 20–50 Hz) show a modest trending increase in the second half of the day (+1.1 and +1.0 dB respectively), consistent with afternoon fanning activity rather than an external disturbance.
🔬 Correlations & DiscoveriesGasResistance vs IAQ (lifespan) | r = -0.993The near-perfect inverse lifetime correlation between gas resistance and IAQ (r = −0.993) in Hive #2 is the expected physical relationship of the BME688 MOX sensor — as reducing VOCs increase, resistance drops and IAQ rises in tandem — and confirms the BSEC2 algorithm is calibrated correctly (acc=3). Current gas resistance at 391 kΩ is ~6% below the all-time avg of 415 kΩ with IAQ at 167 (all-time avg 159), a modest and unsurprising deviation for a peak-summer active colony processing nectar and honey; with stable temperature and acoustics this is a benign observation, not a stress signal.📚 Reference: Bosch Sensortec BME688 datasheet, Frizzera et al. 2020V_5_20Hz vs VibrationRMS (lifespan) | r = +0.989The strong positive correlation between the 5–20 Hz vibration band and overall vibration RMS (r = +0.989) in Hive #2 confirms that low-frequency structural vibration dominates the total vibration energy budget for this hive — consistent with the observed 8° tilt and a stand that mechanically couples low-frequency environmental motion into the hive body. Per the scientific reference data, persistent energy in the 5–20 Hz band indicates structural settling or wind/stand instability; leveling the stand on the next visit will reduce this coupling and improve vibration signal clarity.📚 Reference: Ramsey et al. 2020, Tautz 1996⚠️ Issue: Broad-spectrum acoustic elevation persists for a tenth consecutive day — 100–150 Hz: +6.5 dB, 150–200 Hz: +8.5 dB, 200–260 Hz: +4.3 dB, 1500–3600 Hz: +7.1 dB; sensor reseat and brood check this week remain recommended.⚠️ Issue: Humidity avg 45.5% (low 41.5%) — below the 50–70% brood-optimal range; driven by very dry outdoor conditions (outdoor low 13.5% RH).⚠️ Issue: Tilt at 9° — above the 0–5° ideal range, increased 1° from yesterday; stand leveling recommended; V_5_20Hz/VibrationRMS correlation (r = +0.989) confirms stand instability is contributing to the vibration profile.▹ 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 — temperature locked at 34.9°C avg and vigorous daily fanning peaks confirm a thriving colony.▹ Action: Level the hive stand to bring tilt from 9° toward 0–3° — the V_5_20Hz/VibrationRMS correlation (r = +0.989) confirms stand instability is measurably contributing to the vibration profile.▹ Action: Monitor afternoon humidity lows — if they recur below 41%, assess whether any ventilation management adjustment is appropriate for your setup. -
node_547 healthy Score: 87/100📋 Overall Health
Your Hive #3 continues as the apiary's top performer — brood temperature averaged 34.4°C (all-time avg 33.1°C, now +1.3°C above historical mean and holding its 14-day high) with an exceptionally tight 34.0–34.7°C daily range confirming the sensor is seated firmly in the active brood core; sound spectrum is perfectly stable with all 10 bands within ±0.1 dB of the all-time baseline, vibration at 20.9 mG avg, kurtosis 3.0 (textbook normal), dominant at 80–120 Hz, and humidity averaged 50.3% (range 48.6–51.7%) — the best humidity in the apiary and now solidly within the 50–70% optimal zone. Gas resistance at 226 kΩ is ~21% below all-time avg of 286 kΩ (IAQ 181, acc=3), well-explained by the warmest brood nest in the apiary and peak summer honey-ripening activity, with perfectly stable acoustics confirming no stress signal — continue monitoring the gradual warming trend on your next routine visit.
🌅 Diurnal Cycle PatternsHive #3 shows the tightest diurnal temperature clamping in the apiary at ±0.35°C (34.0–34.7°C), the textbook signature of a sensor seated in the active brood core (van Dooremalen et al. 2024); the 14-day warming drift (+1.4°C from 33.0°C to 34.4°C) represents a healthy, gradual brood nest expansion into peak summer productivity. Humidity holds a steady diurnal arc between 48.6% and 51.7%, averaging 50.3% — the only hive in the apiary consistently touching the optimal 50–70% range, likely because the warm brood core supports slightly higher in-hive moisture retention despite the very dry outdoor conditions (outdoor low 13.5% RH). Vibration is steady around 20.9 mG with no cyclic daily fanning peaks detected and kurtosis 3.0 (perfectly normal); the dominant vibration band at 80–120 Hz (fanning/ventilation activity) is consistent with an actively thermoregulating colony at peak summer brood temperature.
🔬 Correlations & DiscoveriesGasResistance vs TempIn (lifespan) | r = -0.984The strong negative lifetime correlation between gas resistance and brood temperature (r = −0.984) in Hive #3 is a scientifically elegant finding: as the brood nest has warmed from 33.0°C to 34.4°C over 14 days, gas resistance has fallen proportionally (from ~291 kΩ avg to current ~226 kΩ), reflecting the well-documented relationship between metabolic rate, honey ripening intensity, and volatile organic compound production at higher temperatures (Seeley 1974). This is a healthy productivity signal — higher brood temperatures accelerate nectar evaporation, wax synthesis, and brood pheromone release, all of which are detected by the MOX sensor as increased VOC load — and the perfectly stable sound spectrum across all 10 bands confirms there is no accompanying colony stress.📚 Reference: Frizzera et al. 2020, Seeley 1974, Stalidzans et al. 2017V_80_120Hz vs VibrationRMS (lifespan) | r = +0.965The strong positive correlation between the 80–120 Hz vibration band and total vibration RMS (r = +0.965) in Hive #3 confirms that fanning/ventilation activity at ~100 Hz is the dominant driver of substrate-borne vibration in this hive — a healthy finding consistent with an actively thermoregulating brood nest at 34.4°C during peak summer (Hrncir et al. 2011). This single-band dominance of colony vibration energy is characteristic of a well-organized, high-population colony with coordinated fanning behavior, and the ML lifecycle literature (Ramsey et al. 2020) associates this pattern with peak summer productivity stages.📚 Reference: Ramsey et al. 2020, Hrncir et al. 2011, Tautz 1996⚠️ Issue: Gas resistance at 226 kΩ (~21% below all-time avg of 286 kΩ) with IAQ 181 (acc=3) — contextually explained by peak brood-nest temperature and summer honey ripening; perfectly stable acoustics confirm no stress signal; note for ongoing monitoring.▹ Action: On your next routine visit within 5–7 days, confirm fresh eggs and solid brood pattern — the continued 14-day warming arc to 34.4°C avg and perfectly stable acoustics across all 10 bands for ten consecutive days suggest an actively expanding brood nest at peak summer productivity; no urgent action needed.▹ Action: Monitor afternoon humidity — the daily range of 48.6–51.7% is the best in the apiary; if outdoor RH continues at very low levels (13% lows), watch whether daytime peaks continue to hold above 48%.▹ Action: Tilt remains at 2° — excellent; no stand adjustment required.