RU23045U1 - Hearing Aid with Discrete Amplitude-Frequency Corrector (OPTIONS) - Google Patents

Description

Hearing Aid

with DISCRETE AMPLITUDE-FREQUENCY CORRECTOR (OPTIONS).

The useful model belongs to the field of sound engineering.

In hearing aids intended for continuous use, as well as in auditory-speech simulators and in collective use equipment, the correction of the amplitude-frequency characteristic (AFC) is carried out either by the principle of adjusting the tone at low, high, sometimes at medium frequency, or a multi-band equalizer is used.

There are many varieties of hearing instruments in which the frequency response is adjusted smoothly using variable resistors. But even when used in a series of step switches, the nature of the setting remains the same: the signal level in a certain frequency region / 1 / varies.

Known three-channel device 121 for electro-acoustic correction of hearing, which can be taken as the closest analogue. This device contains a microphone, a preamplifier, three bandpass filters, three amplitude compressors, three adjustable amplifiers, an adder, a fraud amplifier, to which the telephone is connected. After dividing the signal into three bands and compression, each of the injected parts of the spectrum arrived at

matching amplifier with adjustable gain. Then the signals were summed up and received through the power amplifier to the telephone.

However, in the known device “the space of adjustments (that is, the totality of possible combinations of adjusting positions) is large, and this

significantly reduces the efficiency of tuning, which is fundamentally important for a stream system of classes in soundclasses with collective use equipment. In addition, in analogs, when tuning the frequency response, they focus on audiograms, while not taking into account the characteristics of the spectral structure of speech sounds.

The objective of the proposed utility model is to develop a frequency response correction system that allows you to quickly configure the equipment, taking into account audiograms, and directly empirically, taking into account the stable characteristics of the spectral characteristics of speech sounds.

In the proposed utility model, the task is solved as follows: the correction is organized as a set of “bell-shaped increases in frequency response at different frequencies, superstructured over a uniform amplitude-frequency characteristic that spans the entire speech range (60-10000 Hz). Each of these "bells can be either turned on or off. If all the “bell” are turned off, then there is a uniform gain over the entire speech range. The frequency bands of the bells correspond to the region of the frequency variation of the fundamental tone, as well as to the arrangement of formant groups characteristic of speech sounds. Thus, the bands are acoustically informative (the spectral characteristics of speech sounds are taken into account). The basic utility model implements three "bell-shaped rise in frequency response.

In the first version of the model, the number of "bells increases from three to four, while in the basic model and in the first version, each" KOLO.11 can be either on or off. In the second option

Claims (4)

1. A hearing instrument with a discrete amplitude-frequency corrector, containing a microphone, a pre-amplifier, three band-pass filters, the inputs of which are connected to the output of the pre-amplifier, an adder, the output of which through the power amplifier is connected to the telephone, characterized in that the on-line filters are connected keys, the output of each of which is connected to one of the inputs of the adder, the fourth input of which is connected to the output of the pre-amplifier, and the frequencies of the bandpass filters are tunable are consistent with the stable characteristics of the spectral characteristics of speech sounds.  2. The device according to claim 1, characterized in that the fourth bandpass filter is additionally introduced, the output of which is connected through the fourth on-off key to the fourth input of the adder, the fifth input of which is connected to the output of the pre-amplifier.  3. A hearing instrument with a discrete amplitude-frequency corrector, comprising a microphone, a pre-amplifier, three band-pass filters, the inputs of which are connected to the output of the pre-amplifier, an adder, the output of which through the power amplifier is connected to the telephone, characterized in that three-position filters are connected to the outputs of the band-pass filters keys to ensure that the corresponding signal is turned off, the average signal level is turned on and the maximum signal level is turned on, the output of each of which is connected to one of the inputs an adder, the fourth input of which is connected to the output of the pre-amplifier, and the frequencies of the bandpass filters are adjusted in accordance with the stable characteristics of the spectral characteristics of speech sounds. 4. The device according to claim 3, characterized in that the fourth bandpass filter is additionally introduced, the output of which is connected through the fourth three-position switch to the fourth input of the adder, the fifth input of which is connected to the output of the pre-amplifier.