Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Glassware Calibration01:11

Glassware Calibration

208
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
208

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Purification of Advanced Therapeutics by Flow-Through Pseudo-Affinity Chromatography: Bi-Specific mABs, Fc Fusion Proteins, and Adeno-Associated Viruses.

Biotechnology and bioengineering·2026
Same author

Objective Comparison of Auditory Profiles Using Manifold Learning and Intrinsic Measures.

Trends in hearing·2026
Same author

Calibration offset estimation in mobile hearing tests via categorical loudness scaling.

International journal of audiology·2026
Same author

A cross-domain test battery for comprehensive hearing loss characterisation using functional, physiological, and vestibular measures.

International journal of audiology·2026
Same author

Audio quality predictions correlate with perception of processing delays across different simulated hearing device conditions.

JASA express letters·2026
Same author

Standard audiogram classification from loudness scaling data using unsupervised, supervised, and explainable machine learning techniques.

International journal of audiology·2026

Related Experiment Video

Updated: Jun 13, 2025

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication
10:28

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

Published on: June 5, 2016

22.4K

Microphone calibration estimation for mobile audiological tests with resonating bottles.

Maximilian Karl Scharf1,2, Rainer Huber1,3, Michael Schulte1,4

  • 1Cluster of Excellence "Hearing4all", Oldenburg, Germany.

International Journal of Audiology
|September 12, 2024
PubMed
Summary

Calibrating smartphone microphones for audiological tests is challenging. Whistling on standardized glass bottles offers a simple, robust method for sound level calibration, suitable for mobile health applications.

Keywords:
Smartphoneacousticcalibrationcitizen sciencemobile health

More Related Videos

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells
06:47

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells

Published on: January 21, 2021

3.1K
Studying Cavitation Enhanced Therapy
07:36

Studying Cavitation Enhanced Therapy

Published on: April 9, 2021

5.2K

Related Experiment Videos

Last Updated: Jun 13, 2025

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication
10:28

Recording Mouse Ultrasonic Vocalizations to Evaluate Social Communication

Published on: June 5, 2016

22.4K
Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells
06:47

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells

Published on: January 21, 2021

3.1K
Studying Cavitation Enhanced Therapy
07:36

Studying Cavitation Enhanced Therapy

Published on: April 9, 2021

5.2K

Area of Science:

  • Biomedical Engineering
  • Acoustics
  • Mobile Health Technology

Background:

  • Smartphone microphones require consistent sound pressure level (SPL) recordings for audiological tests, with a standard uncertainty of 2-3 Decibel (dB).
  • Calibration of smartphone microphones by non-expert users remains a significant challenge for reliable mobile health (mHealth) applications.

Purpose of the Study:

  • To define and evaluate a novel, user-friendly calibration procedure for smartphone microphones using standardized bottle-whistles.
  • To assess the feasibility of this method for achieving accurate sound level calibration suitable for mHealth.

Main Methods:

  • Developed a calibration procedure utilizing whistling on standardized glass bottles (330ml Vichy-shape).
  • Conducted empirical measurements of sound pressure levels (SPL) at a 50cm distance.
  • Calculated mean and standard deviation of single measurements from calibrated and uncalibrated studies.

Main Results:

  • The mean maximal SPL from bottle-whistles was 92.8 ± 1.6 dB SPL.
  • The sound pressure level variation for a single measurement was 3.0 dB SPL.
  • This uncertainty is less than the standard uncertainty of clinical audiograms (4.9 dB).

Conclusions:

  • Whistling on standardized glass bottles provides a coarse sound level calibration for smartphone microphones.
  • This method demonstrates robustness in background noise and reproducibility with defined bottle dimensions.
  • The achieved uncertainty is sufficient for mobile health (mHealth) audiological applications.