Product?
Philips SpeechMike Premium LFH3500 Professional-Grade, Handheld, Programmable, USB dictation
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- Product Summary/License Info
- Product Features
- System Requirements/Technical Specifications
- Resources
Product Summary/License Info:
How delivered? This product is a physically delivered product.
Who can purchase? No restrictions.
Applications? Speech Recognition, Dictation
Connectivity/Form Factor? USB
What's in the box? SpeechMike Premium dictation microphone with attached USB cable (2.5 m / 8.2 ft) and quick start guide.
Warranty? Manufacturer's warranty applies. One (1) year for original end-user purchaser or person who receives product as gift.
Return Policy? This product is a technology hardware product. See our Return Policy.
Questions? Have questions or want a custom quote (with software, accessories, services, etc.)? Contact Us. Also visit our Dictation Support page for more product info.
Product Features:
The Philips SpeechMike Premium LFH3500 is a professional-grade USB dictation microphone built for demanding, high-volume dictation environments. It features studio-quality recording technology, an integrated trackball mouse, and native compatibility with leading speech recognition systems — all in an ergonomic, hygienic housing designed for daily professional use.
- Microphone & Recording Quality
- Free-floating, decoupled studio-quality precision microphone — virtually eliminates background, touch, click, and structure-borne noise
- Optimized hexagonal metal grille allows three times more sound to reach the microphone capsule compared to previous-generation models
- Built-in dual-layer pop filter (fleece above and below the capsule) eliminates breath pop and hiss noise
- Uni-directional electret condenser capsule (10 mm) with 200–12,000 Hz frequency response and signal-to-noise ratio greater than 70 dBA
- Playback
- Double-sized built-in speaker (30 mm dynamic speaker, 300–7,500 Hz, >200 mW output) for clear, crisp playback of recordings
- Operation & Controls
- Push-button operation (the LFH3500 model) for recording, stop, play, and rewind
- Ergonomically contoured housing reduces accidental button presses; trigger and command button positioned for natural finger reach
- Four freely configurable function keys for personalized workflow and speech recognition command programming
- Integrated trackball with self-lubricated, abrasion-resistant Teflon bearings — allows full mouse/cursor control while recording, no need to switch to a separate mouse; trackball is removable for cleaning
- Motion Sensor
- Built-in motion sensor automatically mutes the microphone when the device is set down and unmutes when picked up; also supports custom-programmed events (e.g., pause/resume recording)
- Speech Recognition Compatibility
- Native, built-in support for Nuance Dragon (Professional 12.5–15, Legal 12.5–15, Medical Practice Edition 2/3, SDK Client Edition 14), M*Modal Fluency Direct 8.0+, and Fusion Narrate powered by nVoq
- Also compatible with leading hospital information systems (HIS), radiology information systems (RIS), and PACS systems
- Plug-and-play installation — no additional drivers required for supported systems
- Hygiene & Durability
- Hygienic pearl metallic surface inhibits germ colonization and simplifies routine disinfection
- Polished surface resists fingerprints and touch noise
- Firmware is backwards compatible with previous SpeechMike models — no software changes needed when upgrading
- Platform & Environment Compatibility
- Works with Windows 11, Windows 10 (64-bit), and macOS 12/11 (Mac functionality may be limited)
- Supports virtual environments: Citrix, VMware, and Hyper-V
- Configurable via Philips SpeechControl hardware management software (Windows and Mac)
- Are you looking for the Microsoft Nuance PowerMic 4 or its predecessors, the PowerMic III (PowerMic 3) or PowerMic II (PowerMic 2)?
- Microsoft (formerly Nuance) discontinued all microphone sales including these and other Nuance-branded microphones, as of May 7, 2025.
- Microsoft recommended the Philips SpeechMike microphones as replacements for the PowerMic series.
(In fact, the PowerMic 4 was based on the Philips SpeechMike so features/specs such as the form factor, buttons, etc. are exactly the same.)
See this transition announcement webpage from SPS/Philips: https://www.dictation.philips.com/us/goodbye-powermic-hello-speechmike/
System Requirements/Technical Specifications
Connectivity
- USB 2.0, Type A (compatible with USB 3.0)
Audio Recording
- Microphone type: Electret condenser
- Capsule diameter: 10 mm
- Characteristic: Uni-directional
- Frequency response: 200–12,000 Hz
- Sensitivity: -37 dBV
- Signal-to-noise ratio: >70 dBA
Playback / Speaker
- Speaker type: Built-in round dynamic speaker
- Speaker diameter: 30 mm
- Acoustic frequency response: 300–7,500 Hz
- Output power: >200 mW
Physical
- Dimensions (W × D × H): 45 × 175 × 32 mm / 1.8 × 6.9 × 1.25 in
- Weight: 200 g / 7 oz (including cable)
- Cable length: 2.5 m / 8.2 ft
- Color: Dark grey pearl metallic
- Housing: High-class polymers
System Requirements (for Philips SpeechControl configuration software)
- Processor: Intel dual-core or equivalent AMD, 1 GHz or faster
- RAM: 2 GB (32-bit) / 4 GB (64-bit)
- Hard disk: 30 MB (SpeechControl); 4.5 GB (.NET Framework)
- OS: Windows 11, Windows 10 (64-bit); macOS 12/11 (limited)
- Graphics: DirectX-compliant with hardware acceleration recommended
- Sound: Windows-compatible sound device
- One available USB port
Supported Speech Recognition Software
- Microsoft (formerly Nuance) Dragon Copilot
- Microsoft (formerly Nuance) DAX Copilot
- Microsoft (formerly Nuance) Dragon Medical One
- Microsoft (formerly Nuance) Dragon Professional
- Microsoft (formerly Nuance) Dragon Legal
- Microsoft (formerly Nuance) Dragon Law Enforcement
- Microsoft (formerly Nuance) Dragon Medical Practice Edition
- Microsoft (formerly Nuance) Dragon and Dragon Copilot SDK Client Edition
- M*Modal Fluency Direct
- Fusion Narrate powered by nVoq
Environmental Compliance
- RoHS compliant (2011/65/EU)
- Lead-free soldered
Operating Conditions
- Temperature: 5°–45°C / 41°–113°F
- Humidity: 10%–90%
