Method for obtaining real ear measurements using a hearing aid
The invention regards a method for measuring audio response of a real ear using the microphone of a hearing aid of an end user. The following sequence of steps is performed: provide a sound tight connection between the hearing aid microphone and a first end of a soundguiding flexible tube, disable any further microphones in the hearing aid, place a second end of the tube at the location wherefrom sound is to be captured, provide an audio sound signal at the area of the second end of the tube and record the sound guided through the tube to the microphone of the hearing aid, process the recorded sounds to retrieve sound level values. Hereby real ear measurements may be gained with a hearing aid with only one microphone without any additional measuring equipment.
1. A method of measuring audio response of a real ear using a microphone of a hearing aid of an end user, comprising the following steps in a first sequence:
(a) providing a sound tight connection between the microphone and a first end of a flexible sound guiding tube,
(b) disabling any further microphones in the hearing aid,
(c) placing a second end of the sound guiding tube at a location wherefrom sound is to be captured,
(d) providing an audio sound signal at the area of the second end of the tube and recording sound guided through the tube to the microphone of the hearing aid,
(e) analyzing the recorded sounds to retrieve sound level values, wherein the first sequence of steps (a)-(d) are repeated in a second sequence,
wherein during the first sequence of steps (a)-(d), the second end of the tube is placed near an inlet of the microphone, this being a reference point,
wherein the second end of the tube is placed near a tympanic membrane during the second sequence of steps (a)-(d), and
wherein the ear canal is otherwise left open, and wherein further the audio sound signal provided during both the first and second sequence of steps (a)-(d) from a source outside the hearing aid.
2. A method of measuring audio response of a real ear using a microphone of a hearing aid of an end user, comprising the following of steps in a first sequence:
(a) providing a sound tight connection between the microphone and a first end of a flexible sound guiding tube,
(b) disabling any further microphones in the hearing aid,
(c) placing a second end of the sound guiding tube at a location wherefrom sound is to be captured,
(d) providing an audio sound signal at an area of the second end of the tube and recording sound guided through the tube to the microphone of the hearing aid,
(e) analyzing the recorded sounds to retrieve sound level values, wherein the first sequence of steps (a)(d) are repeated in a second sequence,
wherein during the first sequence of steps (a)-(d), the second end of the tube is connected to an inside volume of a coupler in a test box, this being a reference point,
wherein during the second sequence of steps (a)(d), the second end of the tube is placed near a tympanic membrane with the hearing aid or ear mould in place in the ear canal with possible venting canal blocked, and
wherein the audio sound signal provided during both the first and second sequence of steps (a)-(d), is provided by the hearing aid receiver.