List of works - Lean Helder-Hoek

Acoustic dose-behavioral response relationship in sea bass (Dicentrarchus labrax) exposed to playbacks of pile driving sounds

scientific article published on 31 August 2017

Acoustic reflectivity of a harbor porpoise (Phocoena phocoena)

scientific article published on 01 October 2019

Behavioral Responses of Harbor Seals (Phoca vitulina) to Sonar Signals in the 25-kHz Range

article

Behavioral Responses of a Harbor Porpoise (Phocoena phocoena) Depend on the Frequency Content of Pile-Driving Sounds

scientific article published on 15 March 2022

Behavioral Responses of a Harbor Porpoise (Phocoena phocoena) to 25-kHz FM Sonar Signals

article

Behavioral responses of a harbor porpoise (Phocoena phocoena) to playbacks of broadband pile driving sounds

scientific article published on 8 October 2013

Comparative temporary threshold shifts in a harbor porpoise and harbor seal, and severe shift in a seal.

scientific article published in July 2013

Cumulative Effects of Exposure to Continuous and Intermittent Sounds on Temporary Hearing Threshold Shifts Induced in a Harbor Porpoise (Phocoena phocoena).

scientific article published in January 2016

Effect of level, duration, and inter-pulse interval of 1-2 kHz sonar signal exposures on harbor porpoise hearing

scientific article published in July 2014

Effect of pile-driving sounds on harbor seal (Phoca vitulina) hearing

scientific article published on 01 June 2018

Effects of exposure to intermittent and continuous 6-7 kHz sonar sweeps on harbor porpoise (Phocoena phocoena) hearing

scientific article published in April 2015

Effects of exposure to sonar playback sounds (3.5 - 4.1 kHz) on harbor porpoise (Phocoena phocoena) hearing

scientific article published in October 2017

Frequency of greatest temporary hearing threshold shift in harbor porpoises (Phocoena phocoena) depends on the noise level.

scientific article published in September 2014

Frequency of greatest temporary hearing threshold shift in harbor seals (Phoca vitulina) depends on fatiguing sound level

scientific article published on 01 March 2019

Hearing frequency thresholds of harbor porpoises (Phocoena phocoena) temporarily affected by played back offshore pile driving sounds.

scientific article published in February 2015

Hearing thresholds of a male and a female harbor porpoise (Phocoena phocoena).

scientific article

Hearing thresholds of harbor seals (Phoca vitulina) for playbacks of seal scarer signals, and effects of the signals on behavior

Hearing thresholds, for underwater sounds, of harbor seals (Phoca vitulina) at the water surface

scientific article published on 01 April 2018

Lack of reproducibility of temporary hearing threshold shifts in a harbor porpoise after exposure to repeated airgun sounds

scientific article published on 01 August 2020

Masking release at 4 kHz in harbor porpoises ( Phocoena phocoena ) associated with sinusoidal amplitude-modulated masking noise

scientific article published in September 2021

Pile driving playback sounds and temporary threshold shift in harbor porpoises (Phocoena phocoena): Effect of exposure duration

scientific article published in May 2016

Spatial avoidance to experimental increase of intermittent and continuous sound in two captive harbour porpoises.

scientific article published on 16 October 2017

Temporary Hearing Threshold Shift in California Sea Lions (Zalophus californianus) Due to One-Sixth-Octave Noise Bands Centered at 0.6 and 1 kHz

scientific article published on 15 May 2022

Temporary Hearing Threshold Shift in California Sea Lions (Zalophus californianus) Due to One-Sixth-Octave Noise Bands Centered at 2 and 4 kHz: Effect of Duty Cycle and Testing the Equal-Energy Hypothesis

scientific article published in 2021

Temporary Hearing Threshold Shift in California Sea Lions (Zalophus californianus) Due to One-Sixth-Octave Noise Bands Centered at 8 and 16 kHz: Effect of Duty Cycle and Testing the Equal-Energy Hypothesis

scientific article published on 15 January 2022

Temporary hearing threshold shift in a harbor porpoise (Phocoena phocoena) after exposure to multiple airgun sounds