Acoustic Startle Chamber
Sound-attenuated chamber system for measuring acoustic startle reflex responses in rodents with integrated transducer platform and dual-channel audio stimulation (100-20,000 Hz, 1-120 dB).
Louise Corscadden, PhD
Director of Science · ConductScience
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The Acoustic Startle Chamber provides a standardized platform for measuring startle reflex responses in rodents. The system features a sound-attenuated chamber with integrated transducer platform that converts vertical movement into voltage signals, enabling quantification of acoustic startle responses across a frequency range of 100-20,000 Hz at intensities from 1-120 dB. The dual-channel audio system supports white noise generation and custom sound file playback, while the removable grid platform accommodates both mouse and rat subjects with species-specific rod spacing configurations.
This apparatus enables researchers to conduct prepulse inhibition (PPI), fear-potentiated startle, and startle habituation protocols through the integrated Conductor Software. The system includes dual visible and IR lighting, Hz sound detection, and optional airpuff module integration. Platform capacity supports animals up to 500 grams, with transducer systems optimized for detecting movement responses in behavioral neuroscience applications.
How It Works
The acoustic startle reflex operates through a rapid, involuntary motor response to sudden acoustic stimuli. When sound waves reach the auditory system, they trigger a brainstem-mediated reflex arc involving the cochlear nuclei, caudal pontine reticular nucleus, and spinal motor neurons. This pathway produces a characteristic whole-body startle response within 8-20 milliseconds of stimulus onset.
The chamber's transducer platform converts the vertical movement component of this startle response into a proportional voltage signal. Sound stimuli are delivered through calibrated speakers operating across the rodent hearing range (100-20,000 Hz), while the sound-attenuated environment eliminates external acoustic interference. The dual-channel system enables complex paradigms including prepulse inhibition, where a weak prepulse stimulus 30-500ms before the startle stimulus reduces response amplitude, providing a measure of sensorimotor gating function.
Response quantification occurs through real-time sampling of the transducer voltage output, capturing peak amplitude, response latency, and temporal dynamics of the startle response. The removable grid system provides consistent animal positioning while allowing natural movement, with species-specific rod spacing optimized for mouse (0.795 cm) and rat (0.978-1.4 cm) locomotor patterns.
Features & Benefits
Set of
- 1 mouse
- 1 rat
- 2 mouse
- 2 rat
- 4 mouse
- 4 rat
speaker_frequency_range
- 100-20,000 Hz
speaker_intensity_range
- 1-120 dB
shock_current_range
- 0.1-4.0 mA in 0.1 mA steps
shock_current_type
- DC Current
channels
- Two independent channels
mouse_interior_dimensions
- L x W x H (cm): 6.04 x 6.19 x 4.80
mouse_base_dimensions
- L x W x H (cm): 25.4 x 8.89 x 0.318
mouse_rod_spacing
- 0.795 cm apart
rat_small_interior_dimensions
- L x W x H (cm): 16.5 x 6.09 x 5.08
rat_small_base_dimensions
- L x W x H (cm): 25.4 x 8.89 x 0.318
rat_small_rod_spacing
- 0.978 cm apart
rat_large_interior_dimensions
- L x W x H (cm): 16.5 x 8.1 x 9.1
rat_large_base_dimensions
- L x W x H (cm): 25.4 x 8.89 x 0.318
rat_large_rod_spacing
- 1.4 cm apart
side_rod_diameter
- 0.318 cm
bottom_rod_diameter_mouse
- 0.318 cm
bottom_rod_diameter_rat
- 0.47 cm
white_noise_generator
- included
sound_detector
- Hz detector included
lighting
- Dual visible and IR light bulb
transducer
- converts vertical movement to voltage signal
removable_grid
- Yes
airpuff_module_price
- $890
software_integration
- Neuralynx, Ethovision Integration, SMS and Email integration
Behavioral Construct
- Startle reflex
- Prepulse inhibition
- Fear-potentiated startle
- Startle habituation
- Sensorimotor gating
Automation Level
- semi-automated
Material
- Metal
Capacity
- 0 to 500 grams
Weight
- 0 to 500 grams (animal capacity)
Research Domain
- Anxiety and Depression
- Behavioral Pharmacology
- Learning and Memory
- Motor Function
- Neurodegeneration
- Neuroscience
Species
- Mouse
- Rat
Compatible Tracking Software
- ConductVision
Weight
- 21.0 kg
Dimensions
- L: 43.2 mm
- W: 38.0 mm
- H: 27.9 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Audio Frequency Range | 100-20,000 Hz across dual independent channels | Entry-level systems often provide single-channel output with limited frequency range | Covers complete rodent hearing spectrum enabling complex auditory paradigms and species-specific stimulus optimization. |
| Platform Capacity | 0-500 gram capacity with voltage-converting transducer | Basic systems may have lower weight limits or less sensitive detection | Accommodates full range of adult rodent strains while maintaining sensitivity for detecting subtle movement responses. |
| Chamber Configurations | Species-specific chambers with removable grids (mouse: 0.795cm spacing, rat: 0.978-1.4cm spacing) | Fixed chamber designs often require compromise between species optimization | Optimizes stimulus delivery and animal positioning for both mouse and rat studies without cross-contamination concerns. |
| Sound Intensity Range | 1-120 dB calibrated intensity control | Lower-end systems may have limited intensity range or less precise calibration | Enables threshold testing and high-intensity startle paradigms with precise dose-response characterization. |
| Software Integration | Neuralynx and Ethovision compatibility with SMS/Email integration | Standalone systems often lack integration capabilities | Supports synchronized neural recording and behavioral tracking for comprehensive experimental analysis. |
| Stimulus Delivery Options | White noise generator plus custom sound file compatibility | Basic systems may be limited to standard tone delivery | Provides flexibility for novel experimental designs and specialized acoustic stimulus requirements. |
This acoustic startle system provides comprehensive stimulus control across the full rodent hearing spectrum with species-optimized chamber configurations and integrated software capabilities. The dual-channel audio system and voltage-converting transducer platform enable precise quantification of startle responses while supporting complex behavioral paradigms including prepulse inhibition and fear conditioning protocols.
| Model | SKU | Listed price | Status | Dimensions |
|---|---|---|---|---|
| 4 rat | ME-5826 | $32,360.00 | Available | 43.2 x 38.0 x 27.9 cm |
| 4 mouse | ME-5825 | $31,560.00 | Available | 66.04 x 66.04 x 55.88 cm |
| 1 mouse | ME-5821 | $7,990.00 | Available | 43.2 x 38.0 x 27.9 cm |
| 1 rat | ME-5822 | $8,190.00 | Available | 43.2 x 38.0 x 27.9 cm |
| 2 rat | ME-5824 | $16,280.00 | Available | 43.2 x 38.0 x 27.9 cm |
| 2 mouse | ME-5823 | $15,790.00 | Available | 43.2 x 38.0 x 27.9 cm |
Practical Tips
Perform daily transducer calibration using known weights across the full 0-500g range before experimental sessions.
Why: Ensures consistent voltage-to-movement conversion and maintains measurement accuracy across experimental conditions.
Clean removable grid assemblies with mild detergent between subjects and allow complete drying before reassembly.
Why: Prevents cross-contamination and maintains consistent electrical conductivity for shock delivery protocols.
Allow 10-15 minute habituation period in the chamber before stimulus delivery to reduce handling-induced movement artifacts.
Why: Minimizes non-startle movements that can interfere with response quantification and improves signal-to-noise ratio.
Monitor baseline platform stability for 2-3 minutes before each session to identify potential transducer drift or environmental vibration.
Why: Ensures data quality by detecting technical issues that could affect response amplitude measurements.
If startle amplitudes appear inconsistent, verify speaker positioning and check for cable connection looseness in the transducer interface.
Why: Mechanical connections directly affect signal transmission and stimulus delivery consistency.
Always verify shock current settings are appropriate for species and protocol before beginning fear conditioning sessions.
Why: Prevents animal welfare issues and ensures stimulus intensity falls within established protocol parameters.
Use consistent ambient lighting conditions and minimize laboratory noise during testing sessions.
Why: Controls for environmental variables that can influence baseline anxiety levels and startle reactivity.
Document sound level measurements at the animal position using a calibrated sound meter for each experimental setup.
Why: Provides verification of acoustic stimulus delivery and supports protocol documentation for publication requirements.
Setup Guide
What’s in the Box
- Sound-attenuated chamber with integrated speaker system
- Transducer platform with voltage conversion electronics
- Species-specific removable grid assemblies (mouse and rat configurations)
- Conductor Software with startle reflex protocols
- Audio cables and transducer interface connections
- Hz sound detector and dual lighting system
- White noise generator module
- User manual and protocol documentation (typical)
- Calibration weights and setup tools (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship, with technical support for software configuration and protocol development. Extended warranty and calibration service options are available for laboratory validation requirements.
Compliance
What is the temporal resolution for measuring startle response onset and peak amplitude?
The transducer system converts movement to voltage signals in real-time, enabling detection of startle responses within the typical 8-20ms onset latency range. Consult product datasheet for specific sampling rate and temporal resolution specifications.
Can the system deliver multiple prepulse stimuli with varying interstimulus intervals?
Yes, the dual-channel audio system and Conductor Software support complex prepulse inhibition paradigms with programmable stimulus timing, intensity, and frequency parameters across the 100-20,000 Hz range.
How does the chamber accommodate different rat strains with varying body sizes?
The system includes small rat chambers (16.5 x 6.09 x 5.08 cm) and large rat chambers (16.5 x 8.1 x 9.1 cm) with corresponding grid rod spacing of 0.978 cm and 1.4 cm respectively, supporting rats up to 500g capacity.
What background noise levels are achieved in the sound-attenuated chamber?
The sound attenuation chamber provides acoustic isolation for controlled stimulus delivery, though specific background noise specifications should be confirmed in the product datasheet.
Can the system integrate with electrophysiological recording equipment?
Yes, the system offers Neuralynx integration capabilities for synchronized neural recording during startle testing, enabling correlation of behavioral responses with neural activity.
What data output formats are supported for statistical analysis?
The Conductor Software exports data in standard formats compatible with statistical analysis packages, including response amplitude, latency, and temporal dynamics measurements.
How frequently does the transducer platform require recalibration?
Calibration frequency depends on usage intensity and environmental conditions. Regular validation with known weights across the 0-500g range is recommended, particularly when measurement precision is critical for experimental outcomes.
Can foot shock be delivered through the grid floor for fear conditioning protocols?
Yes, the system includes DC current delivery from 0.1-4.0 mA in 0.1 mA steps through the removable grid system, enabling fear conditioning and fear-potentiated startle paradigms.
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