# Speaker Rescue — Complete Documentation & Technical Reference

> Single comprehensive LLM knowledge base for Speaker Rescue (https://www.speakerrescue.com).

## 1. Platform Identity & Core Constraints

- Brand: Speaker Rescue
- Domain: https://www.speakerrescue.com (Canonical www HTTPS)
- Positioning: Water Eject, Speaker Cleaner & Audio Test Tools
- Definition: Browser-based speaker troubleshooting and audio-testing platform. It is NOT a physical phone-repair company and never implies browser audio can repair corrosion, damaged hardware, electrical faults, or structural damage.

## 2. Audio Engine Architecture

Speaker Rescue synthesizes audio directly in the client browser using the W3C Web Audio API.

### Technical Synthesis Properties:
- Waveforms: Sine and Triangle oscillators (`OscillatorNode`).
- Volume Management: Safe gain clamping (`GainNode`) with exponential ramp-ups (0.001 to 0.8) to prevent acoustic driver popping and voice-coil thermal overload.
- Excursion Mechanics: Frequencies between 130 Hz and 250 Hz (with pulses at 165 Hz) maximize the physical back-and-forth excursion of smartphone loudspeaker diaphragms. The diaphragm acts as a micro-piston, displacing small air volumes through the laser-perforated grille mesh to break surface tension holding water droplets.
- Safety: No auto-play (requires explicit user touch/click). Automatic cleanup on tab backgrounding or route navigation.

## 3. Tool Specifications

### Water Eject Sound (/water-eject)
- Purpose: Eject liquid droplets trapped in speaker grilles after water exposure or immersion.
- Presets:
  1. Quick Cycle (15s): 165 Hz resonant pulse cycle.
  2. Standard Cycle (30s): 130 Hz - 250 Hz low-frequency sweep with 350ms excursion pulses.
  3. Deep Cycle (60s): 120 Hz - 300 Hz multi-phase resonance sweep for stubborn moisture.
- Procedure: Hold smartphone with speaker grille pointing downward onto an absorbent cloth or tissue at 80-100% volume.
- Limitation: Only affects speaker acoustic chambers. Cannot dry USB-C/Lightning charging connectors.

### Speaker Cleaner Sound (/speaker-cleaner-sound)
- Purpose: Agitate surface dust, pocket lint, and debris across speaker mesh grilles.
- Presets:
  1. Dust & Debris Sweep (30s): 100 Hz to 1200 Hz acoustic sweep.
  2. Tone Clarity (20s): 300 Hz to 900 Hz harmonic sweep.
  3. Full Audio Flush (45s): Combined dynamic multi-band vibration cycle.
- Safety: Never insert needles, toothpicks, or cotton swabs into speaker mesh.

## 4. Emergency Diagnostic Protocols

### Emergency Phone Drying (/how-to-get-water-out-of-phone)
1. Power down immediately if submerged; do not plug into a charger.
2. Blot exterior with a microfiber cloth; do not shake violently.
3. Tap phone gently against your palm with the speaker pointing downward.
4. Run water eject audio cycles once exterior moisture is removed.
5. Never use heat (hair dryers), compressed air, or raw rice.

### Charging Port Safety (/how-to-get-water-out-of-charging-port)
- Liquid alerts ("Liquid Detected in Lightning Connector" / "Moisture detected in USB port") indicate electrical conductivity across connector pins.
- Audio tools CANNOT dry charging ports.
- Solution: Tap downward against palm, place in ambient airflow, and allow at least 5 hours of passive drying before connecting a cable. Use Qi/MagSafe wireless charging if emergency power is needed.

### Muffled Speaker Troubleshooting (/phone-speaker-sounds-muffled)
1. Recent liquid exposure -> Run Water Eject sound.
2. Gradual volume loss / pocket lint -> Run Speaker Cleaner sound + soft brush.
3. Software routing -> Check Bluetooth links and accessibility audio balance.
4. Harsh rasping/buzzing -> Hardware diaphragm damage requiring professional service.

## 5. In-Depth Technical MDX Guides & Research

### 1. How Water Eject Sounds Work: Acoustic Physics (/blog/how-water-eject-sound-works)
- Capillary Adhesion: Micro-perforated hydrophobic acoustic mesh (20 to 50 micron pores) traps droplets via Laplace pressure (`ΔP = (2γ · cos θ) / r`).
- Lorentz Force & Diaphragm Motion: Electrodynamic voice coils produce Lorentz force (`F = I · (L × B)`), driving the diaphragm as an acoustic micro-piston.
- Resonant Peak: At 165 Hz, diaphragm excursion reaches maximum linear displacement (0.4 mm to 0.7 mm), atomizing water droplets via Faraday capillary surface waves.
- Proper Orientation: Device must be held facing downward at a 45° to 90° angle so gravity prevents droplets from falling back onto the grille.

### 2. Phone Dropped in Water: First 10 Minutes Emergency Protocol (/blog/phone-dropped-in-water)
- Timeline Urgency: Electric potential between energized PCB power rails (3.8V - 4.4V) and ground (0V) causes rapid anodic dissolution and dendritic short-circuit growth within seconds.
- 5 Critical Steps:
  1. Instant retrieval and immediate hard power-down (cut battery voltage).
  2. Strip protective cases (prevents stagnant moisture reservoirs).
  3. Eject SIM card tray (pressure relief and Liquid Contact Indicator / LDI check).
  4. Directional blotting and downward gravity palm tap.
  5. Active cross-flow room fan ventilation.
- Fatal Mistakes: Never connect a charger for at least 5 to 12 hours; never heat with hair dryers; never shake violently.

### 3. Why Rice Is Not Recommended for a Wet Phone (/blog/why-rice-is-not-recommended-for-a-wet-phone)
- Manufacturer Warnings: Official Apple Support Bulletin 102643 and Samsung notices explicitly warn against placing phones in rice.
- Sorption Inefficiency: Raw uncooked rice is already near its equilibrium moisture content (~12-14% by weight) at room temperature; open room air with a fan dries electronics twice as fast.
- The Greenhouse Trap: Sealing wet electronics in an airtight container creates 95-100% relative humidity, stalling evaporation and accelerating galvanic corrosion.
- Starch Slurry Threat: Abrasive rice starch dust combines with moisture in USB-C/Lightning sockets to form a conductive paste that hardens onto gold pins, causing resistance arcing and melted contacts.

### 4. Water-Resistant vs. Waterproof Phones: What IP67/IP68 Really Mean (/blog/water-resistant-vs-waterproof-phone)
- Standard Definitions: IEC 60529 standard certifies static immersion in calm, fresh water (IP67: 1m for 30 min; IP68: 1.5-6m for 30 min).
- Static vs Dynamic Pressure: Static immersion at 1.5m produces ~14.7 kPa. Running faucets (40-80 kPa) or pool jumps (>200 kPa) easily blow past seals.
- Seal Degradation: Drop impacts fracture perimeter adhesive; thermal cycling embrittles silicone O-rings; soaps/shampoos act as surfactants that collapse water surface tension; saltwater leaves corrosive crystal deposits.
- Warranty Realities: All major manufacturers exclude liquid damage from standard warranties, using internal Liquid Contact Indicator (LDI) sensors to detect exposure.

## 6. E-E-A-T & Fact-Checking Standards

- Sources Cited: Apple Official Support (Articles 102643, 108039), Google Pixel Help (7533279), IEC 60529 International Standard, W3C Web Audio API specifications.
- Authors: Verified research board (Speaker Rescue Research & Editorial Team) with published testing methodologies and hardware benchmark suites.
- Canonical URLs: All URLs in sitemaps and documentation strictly use the canonical `https://www.speakerrescue.com` domain.