Each experimental session included two parts, an initial test to verify that the air puffs were felt but not heard, seen or otherwise perceived, and the main part, which tested participant responses to the auditory stimuli in the presence and absence of air puffs. Stimuli were presented to the participants through ear-enclosing headphones (Sennheiser HD 202 II).
Hd 202 2
Manufactured by Sennheiser
The Sennheiser HD 202 II is a closed-back, circumaural headphone designed for professional use. It features a frequency response of 18 Hz to 18 kHz and a sensitivity of 108 dB. The headphone has a 3.5 mm stereo jack connector and a 3 m coiled cable.
Automatically generated - may contain errors
Lab products found in correlation
3 protocols using hd 202 2
1
Auditory Perception and Air Puff Stimuli
2
Smartphone-Based Hearing Threshold Validation
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The mobile phone used for the smartphone examinations was a Samsung Galaxy S3
(GT-19300), Android OS (v4.3). The software is a threshold prototype developed from the recently validated hearScreen TM application (Swanepoel et al. 2014) . Supra-aural Sennheiser HD 202 II headphones were used with equivalent threshold sound pressure levels (ETSPLs) determined according to ISO 389-9:2009. Calibration was performed using the hearScreen™ calibration function according to prescribed standards (ISO 389-1, 1998) using an IEC 60318-1 G.R.A.S Ear stimulator connected to a Type 1 SLM (Rion NL-52). The smartphone was able to deliver pure tones (adhering to IEC 60645-1) up to 90 dB HL across frequencies assessed (0.5, 1, 2, 4 and 8 kHz). Lowest stimulus levels were 5, 10, 10, 0 and 5 dB HL for 0.5, 1, 2, 4 and 8 kHz respectively.
Conventional air conduction thresholds in the sound booth environments were conducted using a clinical audiometer (GSI 61) with supra-aural earphones (TDH49) calibrated according to ISO 389-1:1998.
(GT-19300), Android OS (v4.3). The software is a threshold prototype developed from the recently validated hearScreen TM application (Swanepoel et al. 2014) . Supra-aural Sennheiser HD 202 II headphones were used with equivalent threshold sound pressure levels (ETSPLs) determined according to ISO 389-9:2009. Calibration was performed using the hearScreen™ calibration function according to prescribed standards (ISO 389-1, 1998) using an IEC 60318-1 G.R.A.S Ear stimulator connected to a Type 1 SLM (Rion NL-52). The smartphone was able to deliver pure tones (adhering to IEC 60645-1) up to 90 dB HL across frequencies assessed (0.5, 1, 2, 4 and 8 kHz). Lowest stimulus levels were 5, 10, 10, 0 and 5 dB HL for 0.5, 1, 2, 4 and 8 kHz respectively.
Conventional air conduction thresholds in the sound booth environments were conducted using a clinical audiometer (GSI 61) with supra-aural earphones (TDH49) calibrated according to ISO 389-1:1998.
3
Automated Audiometric Thresholds Evaluation
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In the case of automated diagnostic audiometry, the hearTest application was loaded onto a Samsung SM-G313H The absolute maximum intensity differed across frequencies according to the output capability of the Sennheiser HD 202 II headphones. From 0.5 to 4kHz the intensity limit was 90 dB HL and at 8 kHz the intensity limit was 80 dB HL. The hearTest output level was restricted to 10 dB HL. Therefore, hearing thresholds below 10 dB HL at 0.5 to 8kHz
were not established in order to account for the minimum output level of hearTest.
were not established in order to account for the minimum output level of hearTest.
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